Quiz about PS M4 Test Review, Work and Energy

Question 1

Energy in the form of motion is potential energy.

Accepted Answer

false

Answer

true

Question 2

According to the law of conservation of energy, mechanical energy can be changed to heat energy.

Accepted Answer

true

Answer

false

Question 3

A rock at the edge of a cliff has kinetic energy because of its position.

Accepted Answer

false

Answer

true

Question 4

When you put on the brakes of a bicycle, friction causes some of the mechanical energy to change to thermal energy.

Accepted Answer

true

Answer

false

Question 5

According to the law of conservation of energy, energy can be created or destroyed.

Accepted Answer

false

Answer

true

Question 6

Energy that is stored is kinetic energy.

Accepted Answer

false

Answer

true

Question 7

Energy stored in food you eat is chemical potential energy.

Accepted Answer

true

Answer

false

Question 8

Elastic energy is the total potential and kinetic energy in a system.

Accepted Answer

false

Answer

true

Question 9

Energy is measured in joules.

Accepted Answer

true

Answer

false

Question 10

Compression energy is stored in a stretched rubber band.

Accepted Answer

false

Answer

true

Question 11

A book sitting on a shelf has gravitational potential energy.

Accepted Answer

true

Answer

false

Question 12

Power is work done over a distance.

Accepted Answer

false

Answer

true

Question 13

The kinetic energy of an object increases as its ___ increases.

Accepted Answer

velocity

Answer

gravitational energy

Answer

potential energy

Answer

specific heat

Question 14

The SI unit for energy is the ___.

Accepted Answer

joule

Answer

calorie

Answer

meter per second

Answer

kilogram

Question 15

Which of the following devices does not make use of electrical energy?

Accepted Answer

upright piano

Answer

radio

Answer

toaster

Answer

digital camera

Question 16

According to the law of conservation of energy, the total amount of energy in the universe ___.

Accepted Answer

remains constant

Answer

changes constantly

Answer

increases

Answer

decreases

Question 17

A device that does work with only one movement and changes the size or direction of a force is a(n) ___.

Accepted Answer

simple machine

Answer

compound machine

Answer

effort machine

Answer

screw

Question 18

The amount by which a machine multiplies an effort force called the ___.

Accepted Answer

mechanical advantage

Answer

efficiency factor

Answer

fulcrum

Answer

resistance force

Question 19

When two or more simple machines work together, they are called a(n) ___.

Accepted Answer

compound machine

Answer

effort machine

Answer

screw

Answer

simple machine

Question 20

The unit of power is the ___.

Accepted Answer

watt

Answer

joule

Answer

meter per second

Answer

second

Question 21

A lever with a mechanical advantage greater than 1 is used to ___.

Accepted Answer

increase force and change direction

Answer

change direction

Answer

increase distance

Answer

increase force

Question 22

What is the proper unit for gravitational potential energy?

Accepted Answer

joules

Answer

gravitons

Answer

newtons

Answer

meters

Question 23

At what point on a roller coaster is the gravitational potential energy (GPE) the lowest?

Accepted Answer

at the lowest point of the roller coaster

Answer

at the top of the highest drop

Answer

while on the decline

Answer

while on the incline

Question 24

Which ball in Figure 4-1 has the greatest potential energy?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 25

Which ball in Figure 4-1 has the least potential energy?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 26

Is it possible for a ball to have both kinetic energy and potential energy at the same time? Explain.

Accepted Answer

Yes, if the ball is in motion above the ground, it has kinetic energy due to its movement and potential energy due to its height.

Answer

No, a ball can only have either kinetic or potential energy at any given time.

Answer

Yes, if the ball is at rest on the ground, it has both kinetic and potential energy.

Answer

No, once a ball starts moving, all of its energy converts to kinetic energy.

Question 27

Which statement best describes the law of conservation of energy?

Accepted Answer

Energy can change forms but cannot be created or destroyed.

Answer

Energy can be created and destroyed depending on the system.

Answer

Energy is always lost as heat and cannot be recovered.

Answer

Energy can only be transferred but not transformed.

PS M4 Test Review, Work and Energy

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