Question 1

A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is

Accepted Answer

A)  1 m.
B)  2 m.
C)  3 m.
D)  4 m.
E)  none of the aboveF) All of the above
G) D) and E)

Question 2

A block of ice sliding down an incline has half its maximum kinetic energy

Accepted Answer

A)  at the top.
B)  at the bottom.
C)  halfway down.
D)  need more informationE) A) and D)
F) B) and C) C

Question 3

A hydraulic press has its input piston depressed 20 centimeters while the output piston is raised 1 centimeter. A 1-newton input can lift a load of

Accepted Answer

A)  1 N.
B)  10 N.
C)  15 N.
D)  20 N.
E)  none of the aboveF) C) and E)
G) A) and B)

Question 4

Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water with kinetic energy of

Accepted Answer

A)  10 J.
B)  500 J.
C)  510 J.
D)  5000 J.
E)  more than 5000 J.F) A) and D)
G) D) and E)

Question 5

The amount of work done on a heavy box carried by Nellie across a room at a constant speed

Accepted Answer

A)  depends on the weight of the box.
B)  depends on the distance walked.
C)  depends on both weight of the box and distance walked.
D)  is none.
E)  none of the aboveF) A) and B)
G) A) and C)

Question 6

When you and your snowboard are in motion, which of the following can be zero?

Accepted Answer

A)  momentum
B)  kinetic energy
C)  mass
D)  inertia
E)  none of the aboveF) None of the above
G) A) and E)

Question 7

After rolling halfway down an incline, a marble's kinetic energy is

Accepted Answer

A)  less than its potential energy.
B)  greater than its potential energy.
C)  the same as its potential energy.D) B) and C)
E) A) and B)

Question 8

Solar power is commonly used to produce

Accepted Answer

A)  heat.
B)  electricity.
C)  both of theseD) All of the above
E) None of the above C

Question 9

Newton's Cradle consists of an aligned row of identical elastic balls suspended by strings so they barely touch one another. When two balls are raised from one end and released, they strike the row and two balls pop out from the other end. If instead, one ball popped out with twice the speed of the two, this would violate

Accepted Answer

A)  momentum conservation.
B)  energy conservation.
C)  both of these
D)  none of theseE) A) and B)
F) None of the above

Question 10

When a cannon is fired, it recoils as the cannonball is set in motion. The cannon and cannonball ideally acquire equal

Accepted Answer

A)  but opposite amounts of momentum.
B)  amounts of kinetic energy.
C)  both of these
D)  neither of theseE) A) and D)
F) All of the above

Question 11

Two 2-m/s pool balls roll toward each other and collide. Suppose after bouncing apart each moves at 4 m/s. This collision violates the conservation of

Accepted Answer

A)  momentum.
B)  energy.
C)  both momentum and energy.
D)  none of the aboveE) A) and B)
F) A) and C)

Question 12

Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of

Accepted Answer

A)  less than 100 J.
B)  100 J.
C)  more than 100 J.D) A) and C)
E) B) and C)

Question 13

Acrobat Bart at the circus drops vertically onto the end of a see-saw, with his partner Art equidistant from the fulcrum at the other end. Art is propelled straight upward a distance twice that of Bart's dropping distance. Neglecting inefficiencies we see

Accepted Answer

A)  the masses of Art and Bart are equal.
B)  Art has half the mass of Bart.
C)  need more informationD) All of the above
E) None of the above

Question 14

Which requires the most amount of work by the brakes of a car?

Accepted Answer

A)  slowing down from 100 km/h to 70 km/h
B)  slowing down from 70 km/h to a stop
C)  equal amounts for bothD) All of the above
E) A) and B) A

Question 15

Hydro and wind power are indirect forms of

Accepted Answer

A)  solar energy.
B)  fossil fuels deep down.
C)  nuclear energy in Earth's interior.
D)  none of the aboveE) B) and C)
F) C) and D)

Question 16

If you do work on a skateboard loaded with friends in one-third the usual time, you expend

Accepted Answer

A)  one third as much power.
B)  the usual power.
C)  three times the usual power.
D)  need more information.E) A) and C)
F) A) and B)

Question 17

Hydrogen, like electricity, is

Accepted Answer

A)  an energy source.
B)  not an energy source.
C)  a source of both thermal and electric power.D) All of the above
E) B) and C)

Question 18

A circus diver drops from a high pole into water far below. When he is halfway down

Accepted Answer

A)  his potential energy is halved.
B)  he has gained an amount of kinetic energy equal to half his initial potential energy.
C)  his kinetic energy and potential energy are equal.
D)  all of the above
E)  none of the aboveF) A) and B)
G) D) and E)

Question 19

The bob of a simple pendulum has its maximum kinetic energy at the

Accepted Answer

A)  top of its swing.
B)  bottom of its swing.
C)  midpoint between top and bottom.
D)  at all points along its path of swing.E) C) and D)
F) B) and C)

Question 20

The most concentrated form of energy is

Accepted Answer

A)  wind.
B)  fossil fuel.
C)  geothermal.
D)  nuclear.E) A) and D)
F) B) and C)

Exam 7: Energy

A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is

Correct Answer
verified

A block of ice sliding down an incline has half its maximum kinetic energy

Correct Answer
verified
C

A hydraulic press has its input piston depressed 20 centimeters while the output piston is raised 1 centimeter. A 1-newton input can lift a load of

Correct Answer
verified

Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water with kinetic energy of

Correct Answer
verified

The amount of work done on a heavy box carried by Nellie across a room at a constant speed

Correct Answer
verified

When you and your snowboard are in motion, which of the following can be zero?

Correct Answer
verified

After rolling halfway down an incline, a marble's kinetic energy is

Correct Answer
verified

Solar power is commonly used to produce

Correct Answer
verified
C

Correct Answer
verified

When a cannon is fired, it recoils as the cannonball is set in motion. The cannon and cannonball ideally acquire equal

Correct Answer
verified

Two 2-m/s pool balls roll toward each other and collide. Suppose after bouncing apart each moves at 4 m/s. This collision violates the conservation of

Correct Answer
verified

Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of

Correct Answer
verified

Acrobat Bart at the circus drops vertically onto the end of a see-saw, with his partner Art equidistant from the fulcrum at the other end. Art is propelled straight upward a distance twice that of Bart's dropping distance. Neglecting inefficiencies we see

Correct Answer
verified

Which requires the most amount of work by the brakes of a car?

Correct Answer
verified
A

Hydro and wind power are indirect forms of

Correct Answer
verified

If you do work on a skateboard loaded with friends in one-third the usual time, you expend

Correct Answer
verified

Hydrogen, like electricity, is

Correct Answer
verified

A circus diver drops from a high pole into water far below. When he is halfway down

Correct Answer
verified

The bob of a simple pendulum has its maximum kinetic energy at the

Correct Answer
verified

The most concentrated form of energy is

Correct Answer
verified

Exam 7: Energy

A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is

Correct AnswerverifiedShow Answer

A block of ice sliding down an incline has half its maximum kinetic energy

Correct AnswerverifiedC

A hydraulic press has its input piston depressed 20 centimeters while the output piston is raised 1 centimeter. A 1-newton input can lift a load of

Correct AnswerverifiedShow Answer

Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny hits the water with kinetic energy of

Correct AnswerverifiedShow Answer

The amount of work done on a heavy box carried by Nellie across a room at a constant speed

Correct AnswerverifiedShow Answer

When you and your snowboard are in motion, which of the following can be zero?

Correct AnswerverifiedShow Answer

After rolling halfway down an incline, a marble's kinetic energy is

Correct AnswerverifiedShow Answer

Solar power is commonly used to produce

Correct AnswerverifiedC

Correct AnswerverifiedShow Answer

When a cannon is fired, it recoils as the cannonball is set in motion. The cannon and cannonball ideally acquire equal

Correct AnswerverifiedShow Answer

Two 2-m/s pool balls roll toward each other and collide. Suppose after bouncing apart each moves at 4 m/s. This collision violates the conservation of

Correct AnswerverifiedShow Answer

Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of

Correct AnswerverifiedShow Answer

Acrobat Bart at the circus drops vertically onto the end of a see-saw, with his partner Art equidistant from the fulcrum at the other end. Art is propelled straight upward a distance twice that of Bart's dropping distance. Neglecting inefficiencies we see

Correct AnswerverifiedShow Answer

Which requires the most amount of work by the brakes of a car?

Correct AnswerverifiedA

Hydro and wind power are indirect forms of

Correct AnswerverifiedShow Answer

If you do work on a skateboard loaded with friends in one-third the usual time, you expend

Correct AnswerverifiedShow Answer

Hydrogen, like electricity, is

Correct AnswerverifiedShow Answer

A circus diver drops from a high pole into water far below. When he is halfway down

Correct AnswerverifiedShow Answer

The bob of a simple pendulum has its maximum kinetic energy at the

Correct AnswerverifiedShow Answer

The most concentrated form of energy is

Correct AnswerverifiedShow Answer

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C

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C

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A

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