Physics: 1-11

Physics is the most basic Science because

Which one of the following problems would not be part of Physics?

Which of the following steps is not a part of the scientific method?

A hypothesis is

A scientific fact is

A theory is

The difference between a hypothesis and a theory is that a hypothesis is

One difference between a hypothesis and a theory is that a hypothesis

Which of these is a scientific hypothesis

A scientific hypothesis may turn out to be right or it may turn out to be wrong. If it is a valid hypothesis there must be a test for proving that it is

To test a scientific hypothesis you would

Which of the following statements is not true?

Science, art and religion do not contradict one another because

Which of the following is a reason to express scientific findings mathematically?

Which of the following is a problem that some people blame on technology?

A science teacher, an art instructor and a religious studies teacher are arguing about their respective disciplines. Which of the following could be a claim that each teacher makes?

A 15-N force and a 45-N force act on an object in opposite directions. What is the net force on the object

What is the maximum resultant possible when adding a 2-N force to and 8-N force?

A 5-N force and a 30-N force act in the same direction on an object. What is the net force on the object ?

What is the minimum resultant possible when adding a 5-N force to an 8-N force?

Equilibrium occurs when

A girl whose weight is 500 N hands from the middle of a bar supported by two vertical strands of rope. What is the tension in each strand?

The weight of a person can be represented by a vector that acts

What would be the safest war to put up a clothesline

A barge is being pulled along a canal by two ropes that make equal angles with the direction in which the barge points. Assuming the two pulls on the barge are equal, in what direction does the barge move?

A clothesline os stretched between two trees. A tire hangs in the middle of the line and the two halves of the line make equal angles with the horizontal. The tension in the line is

A 100-N lantern is suspended by a pair of ropes with 120 degrees between them (Each 60 degrees from the vertical). The tension in each rope is

What is needed to describe a vector quantity?

A scalar quantity has

In order to find the components of a vector, you should

You are helping your aunt move a piano on wheels from one too to another. When you push the piano horizontally, it moves at a constant speed. What can you say about the piano.

The basic unit used by scientist to describe length is the:

The value for the speed of light is

An objects mass on the moon would be the same as its mass on earth.

If an object in motion is unchanged, it is said to be:

Speed is.......

One possible unit of speed is

When you look at the speedometer in a moving car, you see the car's

A train travels 6 meters in the first second of travel, 6 meters again during the second second of travel and 6 meters again during the third second. Its acceleration is

A car starts from rest and after 7 seconds it is moving at 42m/s. What is the car's average acceleration?

As an object falls freely in a vacuum, its

In the absence of air resistance, objects fall at constant

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be

Suppose an object is in free fall. Each second the object falls

If you drop a feather and a coin at the time in a tube filled with air, which will reach the bottom of the tube first?

Consider drops of water leaking from a water faucet. As the drops fall they

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

The hang time (time one's feet are off the ground in a jump) for most athletes is

When a basketball player jumps to make a shot, once the feet are off the floor, the jumper's acceleration

Suppose you take a trip that covers 180 km and takes 3 hours to make. Your average speed is

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car's acceleration?

A ball is thrown straight up. At the top of its path its instantaneous speed is

A ball is thrown straight up. At the top of its path its acceleration is

When something falls to the ground, it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter g. What is the value of g on Earth's surface?

A car accelerates at 2 m/s. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 20 m/s?

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about

A freely falling object starts from rest. After falling for 1 second, it will have a speed of about

If a projectile is fired straight up at a speed of 30 m/s, the total time to return to its starting point is about

The vertical height attained by a basketball player who achieves a hang time of a full one second is about

Suppose a jumper claims a hang time of 2 seconds. Then that jumper must be able to jump a vertical distance of

Acceleration is defined as

Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?

Friction is a force that always acts

The law of inertia states that an object

The law of inertia applies to

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. The reason this can be done is that

An object following a straight line path at constant speed

Friction

One object has twice as much mass as another object. The first object also has twice as much

Compared to its mass on Earth, the mass of a 10 kg object on the moon is

The mass of a lamb that weighs 110 N is about

How much does a 3.0 kg bag of bolts weigh?

A bag of sports equipment has a mass of 10.0 kilograms and a weight of

An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass?

A vector is a quantity that has

A scalar is a quantity that has

When representing velocity as a vector

In order to find the components of a vector, you should

Which of the following would NOT be considered a projectile?

The horizontal component of a projectile's velocity is independent of

In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves.

In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves.

A the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?

A ball is thrown into the air at some angle. At the very top of the ball's path, its velocity is

In the absence of air resistance, the angle at which a thrown ball will go the farthest is

A ball thrown in the air will never go as far as physics ideally would predict because

At what part of a path foes a projectile have minimum speed?

A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air resistance) the ball will land on the ground with a speed of

A projectile launched horizontally hits the ground in 0.8 seconds. If it had been launched with a much higher speed in the same direction, it would have hit the ground (neglecting Earth's curvature and air resistance) in

A projectile is fired horizontally in a vacuum. The projectile maintains its horizontal component of speed because it

An object is dropped and falls freely to the ground with an acceleration of g. It it is thrown upward at an angle instead, its acceleration would be

A baseball is hurled into the air at an angle of 30 degrees above the horizontal and lands on a target if it is thrown at an angle of

A cannonball is launched horizontally from a tower. If the cannon has a barrel velocity of 60 m/s, where will the cannonball be 1 second later? (Neglect air resistance)

After a rock that is thrown straight up reaches the top of its path and is starting to fall back down, its acceleration is (neglecting air resistance)

An airplane flying into a head wind loses ground speed, and an airplane flying with the wind gains ground speed. If an airplane flies at right angles to the wind, then ground speed it

Jose can jump vertically 1 meter from his skateboard when it is at rest. When the skateboard is moving horizontally, Jose can jump

What is the resultant of a 3-unit vector and 4-unit vector at right angles to each other?

In Chapter 4, you learned about "hang time," the time a jumper's feet are off the ground in a vertical jump. If the jumper runs horizontally and has the same vertical component of takeoff velocity, hang time will be

Suppose a small plane can fly at 170 km/h relative to the surrounding air. Suppose also that there is a 60 km/h tailwind. How fast does the plane's shadow move across the ground?

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?

A cannonball is fired at some angle into the air. In the first second it moves 5 meters horizontally. Assuming it doesn't hit the ground and air resistance is negligible, how far does it move horizontally in the next second?

In the absence of air resistance, at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?

A ball is thrown straight upward a 10 m/s. Ideally (no air resistance), the ball will return to the thrower's hand with a speed of

A cannon with a barrel velocity of 140 m/s launches a cannonball horizontally from a tower. Neglecting air resistance, how far vertically will the cannonball have fallen after 4 seconds?

Accelerations are produced by

How does acceleration of an object change in relation to its mass? it is..

The acceleration produced by a net force on an object is...

When an object reaches terminal velocity its acceleration is..

A 10-kg brick and a 1-kg book are dropped in a vacuum. the force of gravity on the 10kg brick is..

When a women stands with two feet on a scale the scale reads 280 N. when she lifts one foot the scale reads...

Suppose the force of friction on a sliding object is 25 N. the force needed to maintain a constant velocity is..

an apple weights 1-N. the net force on the apple when it is in free fall is..

A girl pulls on a 10-kg wagon with a constant force of 20 N. what is the wagon's acceleration?

ab object has a constant mass. A constant force on the object produces constant

A force of 3N accelerates a mass of 3 kg at the rate of 1m/s. the acceleration of a mass of 6 kg acted upon by a force of 6 N is

A push on a 1 kilogram brick accelerates the brick. Neglecting friction, to equally accelerate a 10-kilogram brick one would have to push

A rock is thrown vertically into the air. at the very top of its trajectory the net force on it is..

a box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. what is the frictional force between the box an the surface

the unit of pressure is

which of the falling would exert the most pressure on the ground?

a tennis ball and solid steel ball with the same diameter are dropped at the same time. which ball has the greater force acting on it?

a tennis ball and solid steel ball with the same diameter are dropped at the same time. in the absence of resistance, which ball has the greater acceleration?

if you pull horizontally on a desk with a force of 150N and the desk doesn't move, the friction force must be 150 N. now if you pull with 250 N so the desk slides at a constant velocity, the friction is

a block is at rest on an incline. the force of friction necessary to prevent the block from sliding increased when the incline angle is

consider a ball rolling down the decreasing slope inside a semicircular bowl(the slope is steep at the top of the rim, get less steep towards the bottom, and is zero (no slope) at the bottom). as the ball rolls from the rim downward toward the bottom, its rate is gaining speed

a speeding truck locks its brakes and it skids to a stop. if the trucks total mass were doubled, its skidding distance would be

if the force acting on a cart doubles, what happens to the carts acceleration

suppose a cart is being moved by a force. if suddenly a load is dumped into the cart so that the cats mass doubles, what happens to the carts acceleration?

you are on a frozen pond, and the ice starts to crack. if you lie down on the ice and began to crawl......

a 20 N falling object encounters a 4 N of air resistance. the magnitude of the net force on the object is

a sports car has a mass of 1500 kg and accelerates at 5 meters per second squared. what is the magnitude the force acting on the sports-car?

a tow truck exerts a force of 2000 N on a car, accelerating it at 1m/s. what is the mass of the car?

a jet has a mass of 40,000 kg. the thrust for each of four engines is 20,00 N. what is the jets acceleration when taking off?

you pull horizontally on a 50kg crate with a force of 450N and the friction force on the crate is 250N. the acceleration of the crate is?

how much force is needed to accelerate a 4 kg physics book to an acceleration of 2. m/s

a jumbo jet cruises at a constant velocity when the total thrust of the engines on the jet is 50,000 N. how much air resistance acts on the jet

A 6 N falling object encounters a 6 N of air resistance. the magnitude of the net force on the object is

if shopping cart A has five times more mass in it than shopping cart B and the two carts are pushed with equal forces, you can expect the acceleration of the shopping cart A to be

If a truck has ten times the mass of a car and the two vehicles are pushed with an equal force, you would expect the acceleration of the truck to be

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

If your car runs out of gas, why can't you push on the cars windshield from the inside to move it?

A force is exerted on the tires of a car to accelerate the car along the road. The force is exerted by the

Nelly Newton holds an apple in her hand. If action is Earth pulling on the apple, then reaction is

A 60-kg person on in-line skates pushes against a wall with a force of 30 N and recoils. What acceleration does that person experience?

If a horse pulls on a wagon at rest, the wagon pulls back equally on the horse. Can the wagon be set into motion?

A helicopter can fly because:

You drive past a farm, and you see a cow pulling a plow to till a field. You have just learned about Newton's third law, and you wonder how the cow was able to move forward if the plow is exerting equal and opposite force on the cow. Which of the following explains the movement of the cow and plow?

According to Newton's third law, if you push gently on something, it will push

In order for newtons third law to occur,

As a 600-N woman sits on the floor, the floor exerts a force on her of

A pair of blocks, one 2 times as massive as the other, are connected by a compressed spring. When the spring is released, the blocks fly apart. Compared to the heavier block, how many times as fast as the lighter block accelerate?

Earth pulls on the moon, and similarly the moon pulls on Earth. This is evidence that the

A rocket is able to accelerate in the vacuum of space what it fires it's engines. The force that propels the rocket is the force

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.

If you exert a force of 12,000 N on a 3000 kg car and a 6000 kg truck that are both originally at rest, what will be the resulting acceleration of the objects?

An archer shoots and arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the

Forces always occur

Bronco the skydiver falls toward Earth. The attraction of Earth on Bronco pulls him down. The reaction to this force is

A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force?

If you push off the ground with a force of 350 N when you jump upward, what force pushes Earth downward?

A fighter punches a piece of paper in mid air, and brings it from rest up to a speed of 40 m/s in 0.08 seconds. What is the force of impact on the paper if the mass of the paper is 0.01 kg?

Woman weighing 550 N sits on the floor. She exerts a force on the floor of

A large truck and a small car traveling at the same speed have a head on collision. The vehicle to undergo the greater change in velocity will be

Two people have a tug-of-war on low friction ice. One person has two times the mass of the other. Compared to the lighter person, how many times as fast as the heavier person accelerate?

Two people pull out of rope in a tug-of-war. Each pose with 400 N of force. What is the tension in the rope?

A player catches a ball. Consider the action force to be the impact of the ball against the players glove. What is the reaction to this force?

A person is attracted towards the center of earth by a 440 N gravitational force. The force with which Earth is attracted toward the person is

As a ball falls, the action force is the pool of earths mass on the ball. What is the reaction to this force?

A high school student hits a nail with a hammer. During the collision, there is a force

What engine thrust (in Newtons) is required for a rocket of mass 35 kg to leave the launching pad?

A karate chop delivers a blow of 2300 N to a board that breaks. The force that acts on the hand during this feat

Suppose two people, one having three times the mass of the other, pull on opposite sides of a 20-meter rope while on frictionless ice. After a brief time, they meet. The more massive person slides a distance of

Suppose you accidentally drive into a tree. Which of the following correctly describes the interaction between your car and the tree?

An unfortunate bug splatters against the windshield of a moving car. Compared to the deceleration of the car, the deceleration of the bug is

The momentum of an object is defined as the objects

Which has more momentum, a large truck moving at 30 miles per hour or a small truck moving 30 miles per hour

Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles has

If the momentum of an object changes and its mass remains constant

The momentum change of an object is equal to the

In order to increase the final momentum of a golf ball we could

The reason padded dashboards are used in cars is that they

Momentum of a system is conserved only when

A collision is considered elastic if

Suppose Katie is standing on a pond where there is no friction between her feet and the ice, in order to get off the ice she can

which of the following has the largest momentum

A freight train rolls along a track with considerable momentum. If it were to roll at the same speed but had twice as much mass its momentum, would be

A cannon recoils from launching a cannonball. the speed of the cannons recoil is small because the

suppose a cannon is made of a strong but very light material, suppose also that cannonball is more massive than the cannon itself. for such a system

two objects, A and B have the same size and shape, but A is twice as heavy as B. When they are dropped simultaneously from a tower, they reach the ground at the same time, But A has a higher

In order to catch a ball, a baseball player moves his or her hand backward in the direction of the balls motion. Doing this reduces the force of impact on the players hand principally because

A care traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has

A cannon fires a cannonball. the speed of the cannon ball will be the same as the speed of the recoiling cannon

the force of an apple hitting the ground depends upon

When you jump off a step, you usually bend your knees as you reach the ground. By doing this, the time of the impact is about 10 times more what it would be in a stiff legged landing, and the average force on your body is reduced by

Recoil is noticeable if you throw a heavy ball while standing on roller skates. if instead you go through the motions of throwing the ball but hold onto it, your net recoil velocity will be

A Karate expert executes a swift blow and splits a cement block with her hand

A moving freight car runs into an identical car at rest on the track. The cars couple together. compared to the velocity of the first car before the collision the velocity of the combined cars after the collision is

two gliders having the same mass and speed move toward each other on an air track and stick together. after the collision the velocity of the gliders is

A piece of putty moving with 2 units of momentum strikes and sticks to a heavy bowling ball that is initially at rest. after the putty sticks to the ball, both are set in motion with a combined momentum that is

The force that accelerates a rocket into outer space is exerted on the rocket by

If all people, animals, trains, and trucks all over the world began to walk or run towards the east then

Suppose an astronaut in outer space wished to toss a ball against a very massive and perfectly elastic concrete wall and catch it as it bounces back. If the ball is as massive as the astronaut then

a table tennis ball moving forward with 5 units of momentum strikes and bounces backward off a heavy bowling ball that is initially at rest and free to move . The bowling ball is set in motion with a momentum of

Superman is at rest in space when he throws an asteroid that has more mass than he does. Which moves faster, Superman or the Asteroid?

A cannonball shot from a long barrel cannon travels faster than one shot from a short barrel because the cannonball receives a greater

While roller skating Granny collides with her tiny grandson Chester who is at rest, Ignoring any friction effects, chesters speed after the collsion

A small economy car(low mass) and a Limousine(high mass) are pushed from rest across a parking lot, equal distances with equal forces. The car that receives the greater impulse is the

A 2-kg ball is thrown at 3 m/s what is the balls momentum

A 4 kg ball has a momenutim of 20 kg ms what is the balls speed

A ball is moving at 6 ms and has a momentum of 24 kg ms what is the balls mass

In physics, work is defined as

If you lift two loads up one story, how much work do you do compared to lifting just one load up one story?

If you lift one load up two stories, how much work do you do compared to lifting one load up only one story?

If Nellie Newton pushes an object with twice the force for twice the distance, she does

The unit of work is the

Power is defined as the

The unit of power is the

Potential energy is the energy an object has because of its

The amount of potential energy possessed by an elevated object is equal to

Kinetic energy of an object is equal to

How much farther will a car traveling at 100 km/s skid than the same car traveling at 50 km/s?

An arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat, how much kinetic energy will it have after it has been shot?

Energy is changed from one form to another with no net loss or gain.

As a pendulum swings back and forth

When a car's speed triples, its kinetic energy

Rockets are launched from an airplane in the forward direction of motion. The kinetic energy of the airplane will be

A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of work but different amounts of

Which requires more work: lifting a 70-kg sack vertically 2 meters or lifting a 35-kg sack vertically 4 meters?

A ball is thrown into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is

An object that has kinetic energy must be

An object that has kinetic energy must have

Which has greater kinetic energy, a car traveling at 30 km/h or a half-as-massive car traveling at 60 km/h?

A person on a roof throws one ball downward and an identical ball upward at the same speed. The ball thrown downward hit the ground with 140 J of kinetic energy. Ignoring air friction, with how much kinetic energy does the second ball hit the ground

An object at rest may have

If an object has kinetic energy, then it also must have

If the velocity of a moving object doubles, then what else doubles?

All simple machines ideally work on the principle that

About how efficient is a typical gasoline-burning car engine?

A small economy car )low mass) and a limousine (high mass) are pushed from rest across a parking lot, equal to distances with equal forces. The car that receives more kinetic energy is the

A popular toy consists of an aligned row of identical elastic balls suspended by strings so they touch each other. When two balls on one end are elevated and released, they slam into the array of balls and two balls pop out the other side. If instead, one ball popped out with twice the speed, this would be a violation of the conservation of

Consider molecules of hydrogen gas and molecules of heavier oxygen gas that have the same kinetic energy. The molecules with the greater speed are

How many joules of work are done on a box when a force of 25 N pushes at 3 m?

How much power is required to do 40 J of work on an object in 5 seconds?

How much work is done on a 60-N box of books that you carry horizontally across a 6-m room?

How much work is done on a 20-N crate that you lift 2 m?

How much power is expended if you lift a 60 N crate 10 meters in 1 second?

Suppose a moving car has 3000 J of kinetic energy. If the car's speed doubles, how much kinetic energy will it then have?

It takes 8- J to push a large box 8 m across a floor. Assuming the push is in the same direction as the move, what is the magnitude of the force on the box?

If Kelly the kater's speed increases so he has three times the momentum, then his kinetic energy increases by

A 60-N object moves at 1 m/s. Its kinetic energy is

Sue can easily lift a 45-N rock with the help of a lever. When she pushes down with 20 N of force, she lifts the rock 0.3 meters. How far does she move her arms to do this?

Mechanical energy can be in the form of

When a worker shovels coal into the furnace of a train engine, energy is released from the cool as heat. The heat is used to make steam, which is then used to turn the wheels of the engine. Living cells can also be thought of as machines. What biological process uses combustion to release energy from molecules so that cells can do work?

If Earth rotated faster about its axis, your weight would A. Decrease B. Increase C. Stay the same.

Stunt motorcyclist Biker Pete rides his bike inside a futuristic rotation space station- a giant rotation donut- shaped structure in space. The normal support feels like weight to him. As he rides his bike in the same direction that the station rotates, the normal force. A. Remains unaffected B. Decreases C. Increases

As the rotation speed of a space habitat increases, the weight of the people inside... A. Stays the same B. Increases C. Decreases

Which has greater angular speed, a horse near the outside rail of the merry go round or a horse near the inside rail? A. The outside horse B. The inside horse C. Neither- they both have the same angular speed

Earth rotates and revolves through space. Earth rotates about the ___, which is an ___ axis. Earth revolves about the ___, which is ___ axis. A. sun, external, north/south pole, internal. B. north/south pole, external, sun, internal. C. north/south pole, internal, sun, external. D. sun, internal, north/south pole, external.

A race car travels in a circle with a constant speed. The net force on the race car... A. Is zero because the race car is not accelerating. B. Is directed towards the center of the curve. C. Is directed forward in the direction of travel. D. none of the above.

Tapered rims on a railroad train wheels enable to round curves without any wheels skidding. Consider a curve with the outer track is one part in 25 linger than the inner track. The wide part of the rim should have a diameter wider than the narrow part by at least one part to____. A. 25 B. 50 C. 12.5 D. 2

If you whirl a ball on the end of a string and the string suddenly breaks, the ball will.... A. Fly off, tangent to its circular path. B. Fly directly toward you. C. Spiral away from your hand. D. Fly directly away from you. E. Spiral in toward your hand.

A person weighs less at the equator than at the poles. The reason for this has to do with the... A. Spin of the Earth. B. Influence of the sun, moon, and all of the planets. C. Tidal bulges. D. Higher temperatures at the equator, and the expansion of matter. E. Too much thanksgiving dinner.

Newbs Newton swings a rock into a circular path while holding an attached string overhead. The string makes a 45- degree angle to the vertical (compromising a "concial pendulum"). The centripetal force that holds the rock in its circular path is the.... A. Tension in the string. B. Vertical component of the string tension. C. Horizontal component of the String tension. D. None of the above.

Earth Rotates in a/ an_________direction. A. Elliptical B. Circular vector C. Clockwise D. Counter Clockwise

When a railroad train rounds a banked track, the centripetal force needed comes not from friction, but from the... A. Horizontal component of the normal force. B. Normal force. C. Vertical component of the normal force. D. None of the above.

A space habitat is designed so that the variation in g between a person's head and feet is less than 0.01 g. If the person is 2 m tall, then the radius of the habitat is... A. 2000 m B. 200 m C. 20 m D. more than 2000 m

A vertical pole standing against a wall topples to the ground and the center of the pole has a speed of 26 m/s as it hits the ground. With what speed does the far end of the pole hit the ground? A. 52 m/s B. 26 m/s C. 39 m/s D. 13 m/s

To weigh less in the Southern Hemisphere, you should go... A. West B. North C. East D. South

Nick Spacewalker hovers in space beside a rotating space station in outer space. Both he and the center of mass of the space station are at relative rest. If the space station is in Earth's orbit, than Nick A. may or may not be in Earth orbit. B. is not in Earth's orbit. C. Is also in Earth's orbit.

A game room in a rotating space habitat is located in a 0.25-g region. If a person can jump 0.5-m high in a 1-g region, how high can the same person jump in the game room? A. 8 m B. 4 m C. 2 m D. More than 8 m E. 0.5 m

Which of the following is not a unit of rotational speed? A. Miles per hour B. Revolutions per minute C. Rotations per minute D. Rotations per second E. Revolutions per second

The tangential speed of the outer rim of a ferris wheel is 30 m/s. What is the tangential speed of a position half- way from the center to the outer rim. A. 20 m/s B. 60 m/s C. 15 m/s D. 10 m/s

People in the future may well live inside a rotating space structure that is more than 2 km in diameter. Inside the structure, people on the inside of the outer edge will experience 1 g while people halfway to the axis will experience A. 1 g B. 0 g C. 1/4 g D. 2 g E. 1/2 g

A rock whirled on the end of a string moves in a circle because... A. Once the rock starts moving, that is its natural tendency. B. The rock continually pulls on the string. C. There is an inward force acting on the rock. D. There is a force on the rock pulling it outward. E. All of the above.

A possible space habitat of the future is a cylinder in space rotating about its long axis. What is the relative gravitational field along the axis of the habitat? A. Three- Quarters G B. Zero C. One- Quarter G D. One- Half G E. G

"Centrifugal forces" are an apparent reality to observers in a reference frame that is ... A. At rest B. An intertial reference frame C. Moving at a constant velocity D. Rotating E. Bouncing

You sit at the outer rim of a ferris wheel that rotates at 22 revolutions per minute (RPM). What would your rotational speed be if you were instead clinging to a position half- way from the center to the outer rim? A. 11 RPM'S B. 2 RPM'S C. 44 RPM's D. 22 RPM's

What is the direction of the force that acs on clothes in the spin cycle of a washing machine? A. Up B. Down C. Outward D. Inward

Which has greater linear speed, a horse near the outside rail of a merry go round or a horse near the inside rail? A.The outside horse B. Neither- they both have the same speed C. The inside horse

Stunt motorcyclist Biker Harry rides his bike inside a futuristic rotating space station- a giant rotating donut- shaped structure in space. The normal support force feels like weight to him. As he rides his bike in the opposite direction to the station's rotation, the normal force... A. Increases B. Decreases C. Remains the same

The centripetal force exerted on stunt motorcyclist Biker Bruno while riding on the inner vertical surface of a circular track is A. His weight B. The normal force C. Friction D. None of the above

At the outer edge of a rotating habitat, 130m from its center, the rotational acceleration is g. What is the rotational acceleration at a distance of 65 m from the center of the habitat. A. 2x g B. 1/3 g C. 4x g D. 1/2 g

A worm rests on the bottom of a tin can that is being whirled horizontally on the end of a string. Since the worm, like the tin can, moves in a circle, there must be a force on it. What exerts this force? A. Gravity B. Your hand C. The tin can D. The String E. There is no force acting on it.

Where is the center of gravity of a softball bat located?

When a wrench is slid spinning over a frictionless tabletop, its center of gravity follows

An object will fall over if its center of gravity is

When you carry a heavy load with one arm, why do you tend to hold your free arm away from your body?

If an object is in unstable equilibrium, any displacement will

If an object is in stable equilibrium, any displacement will

If an object is in neutral equilibrium, any displacement will

If you try to touch your toes while standing flat against a wall, you probably will fall over. The reason this happens is that

The center of mass of the solar system

The long heavy tail of a spider monkey enables the monkey to easily vary is

The center of mass of a human body is located at a point

An object thrown into the air with a spin rotates about its

A fish suspended in water is in what kind of equilibrium

A ball resting on the floor is in what kind of equilibrium

A picture hangs on a wall from a wire that is passed over a supporting nail. The picture is in stable equilibrium because

Based on stability concepts, you would expect a very broad tree to have

You push a table tennis ball beneath the surface of water in a glass of water. The center of gravity of the glass of water

Torque is defined as

Suppose you try loosening a nut with a wrench, and the nut doesn't give at all. You increase your chance of success if you

To turn a stubborn screw, it is best to use a screwdriver that has a

At the health spa, Felix Flex finds that pulleys in the exercise machines are not circular, but are cams- oval-shaped pulleys. At different orientations, the cams provide different

Two people sit on a balanced seesaw. When one person leans toward the center of the seesaw, that person's end of the seesaw will

A meter stick is balanced at the 50.0 cm mark. You tie a 10.0N weight at the 15.0 cm mark. Where should a 30.0 N weight be placed so the meter stick will again be balanced?

An object in motion with a constant force and no resistance will either travel in a straight line or travel

Most females have a better ability to balance their bodies in motion compared to a male because