Exam 3: Energy and Conservation Laws

A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling.Assuming there is no friction and the bottom of the hill is 20 meters below the top,what is the bicyclist's speed at the bottom of the hill?

(Short Answer)

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Question 121

The momentum of an object never changes.

(True/False)

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Question 122

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Linear momentum

(Multiple Choice)

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Question 123

An object has kinetic energy when it is __________.

(Short Answer)

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Question 124

The energy of a body moving across a horizontal surface is an example of __________ energy.

(Short Answer)

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Question 125

Consider a situation where two moving objects collide, stick to each other, and move off together. -Linear momentum

(Multiple Choice)

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Question 126

Linear momentum is conserved in __________ collisions.

(Short Answer)

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Question 127

A barrel rolling down an inclined ramp has only kinetic energy.

(True/False)

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Question 128

You carry a 20-N box 5 m horizontally across a room.The work you do is __________.

(Short Answer)

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Question 129

Conservation laws can be used even when the details of what is occurring inside a system aren't known.

(True/False)

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Question 130

Match each item with the correct statement below. -the type of energy contained in a compound bow when drawn to its maximum extension

(Multiple Choice)

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Question 131

Kinetic energy is conserved in elastic collisions.

(True/False)

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Question 132

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is 1,200 W.

(True/False)

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Question 133

Which of the following is not an example of potential energy?

(Multiple Choice)

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Question 134

Consider a situation where two moving objects collide and rebound from each other. -Linear momentum

(Multiple Choice)

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Question 135

Using a lever to move a rock reduces the force a person must exert.What does it do to the work the person must do?

(Multiple Choice)

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Question 136

A mover slides a refrigerator 5 meters across a floor.If a force of 200 N was used,how much work was done?

(Short Answer)

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Question 137

The mass of 1 cubic meter of fresh water at the top of a 100 m hydroelectric dam is 1,000 kg and it has a potential energy of 980,000 N.At the bottom of the dam,the speed of the moving water is

(Multiple Choice)

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Question 138

Match each item with the correct statement below. -energy due to motion

(Multiple Choice)

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Question 139

A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. (a)How much work does the person do? (b)What is the diver's kinetic energy upon entering the water after diving off?

(Short Answer)

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Question 140

Showing 121 - 140 of 140

A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling.Assuming there is no friction and the bottom of the hill is 20 meters below the top,what is the bicyclist's speed at the bottom of the hill?

The momentum of an object never changes.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Linear momentum

An object has kinetic energy when it is __________.

The energy of a body moving across a horizontal surface is an example of __________ energy.

Consider a situation where two moving objects collide, stick to each other, and move off together. -Linear momentum

Linear momentum is conserved in __________ collisions.

A barrel rolling down an inclined ramp has only kinetic energy.

You carry a 20-N box 5 m horizontally across a room.The work you do is __________.

Conservation laws can be used even when the details of what is occurring inside a system aren't known.

Match each item with the correct statement below. -the type of energy contained in a compound bow when drawn to its maximum extension

Kinetic energy is conserved in elastic collisions.

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is 1,200 W.

Which of the following is not an example of potential energy?

Consider a situation where two moving objects collide and rebound from each other. -Linear momentum

Using a lever to move a rock reduces the force a person must exert.What does it do to the work the person must do?

A mover slides a refrigerator 5 meters across a floor.If a force of 200 N was used,how much work was done?

The mass of 1 cubic meter of fresh water at the top of a 100 m hydroelectric dam is 1,000 kg and it has a potential energy of 980,000 N.At the bottom of the dam,the speed of the moving water is

Match each item with the correct statement below. -energy due to motion

A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. (a)How much work does the person do? (b)What is the diver's kinetic energy upon entering the water after diving off?

The Study of Motion

Newtons Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Electromagnetism and Em Waves

Optics

Atomic Physics

Nuclear Physics

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Exam 3: Energy and Conservation Laws

A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling.Assuming there is no friction and the bottom of the hill is 20 meters below the top,what is the bicyclist's speed at the bottom of the hill?

The momentum of an object never changes.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Linear momentum

An object has kinetic energy when it is __________.

The energy of a body moving across a horizontal surface is an example of __________ energy.

Consider a situation where two moving objects collide, stick to each other, and move off together. -Linear momentum

Linear momentum is conserved in __________ collisions.

A barrel rolling down an inclined ramp has only kinetic energy.

You carry a 20-N box 5 m horizontally across a room.The work you do is __________.

Conservation laws can be used even when the details of what is occurring inside a system aren't known.

​Match each item with the correct statement below.​ -the type of energy contained in a compound bow when drawn to its maximum extension

Kinetic energy is conserved in elastic collisions.

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is 1,200 W.

Which of the following is not an example of potential energy?

Consider a situation where two moving objects collide and rebound from each other. -Linear momentum

Using a lever to move a rock reduces the force a person must exert.What does it do to the work the person must do?

A mover slides a refrigerator 5 meters across a floor.If a force of 200 N was used,how much work was done?

The mass of 1 cubic meter of fresh water at the top of a 100 m hydroelectric dam is 1,000 kg and it has a potential energy of 980,000 N.At the bottom of the dam,the speed of the moving water is

​Match each item with the correct statement below.​ -energy due to motion

A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. (a)How much work does the person do? (b)What is the diver's kinetic energy upon entering the water after diving off?

The Study of Motion

Newtons Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Electromagnetism and Em Waves

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Match each item with the correct statement below. -the type of energy contained in a compound bow when drawn to its maximum extension

Match each item with the correct statement below. -energy due to motion