Cumulative Exam — Cumulative exam Answers

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3

A change from one form of energy into another is called

A
gravitational potential energy.
B
work.
C
conservation of energy.
D
an energy transformation.
4

If you put a pot on the stove, the pot becomes hot. The heat is transferred to the pot on the burner by radiation. Please select the best answer from the choices provided

A
T
B
F
5

If gravity did not affect the path of a horizontally thrown ball, the ball would ____.

A
go straight up
B
travel horizontally
C
fall straight down
D
follow a curved path
6

The law of conservation of energy states that when one form of energy is converted into another,

A
energy is destroyed in the process.
B
no energy is destroyed in the process.
C
energy is created in the process.
D
some amount of energy cannot be accounted for.
7

When you push downward on Earth to make a pole vault, Earth exerts an equal force on the pole.

A
T
B
F
8

Newton’s third law of motion states that every action has an __________ but __________ reaction.

A
equal, identical
B
opposite, real
C
equal, opposite
D
identical, frictional
11

Heat is thermal energy transferred from one object to another because of a difference in ____.

A
mass
B
temperature
C
volume
D
potential energy
12

Please select the word from the list that best fits the definition

A
work
B
power
14

The law of conservation of energy states that energy is neither created nor destroyed, it just changes form.

A
T
B
F
15

The force that pulls falling objects toward Earth is called

A
gravity.
B
free fall.
C
acceleration.
D
air resistance.
17

What allows us to stand upright and keeps us from falling through the ground?

A
While gravitational force pulls us down, the opposing force from the ground pushes up and balances out the two forces
B
The force of gravity is stronger than the force of the ground pushing up on us
C
While gravitational force pulls us down, the ground is pulling us down too
D
The force of the ground pushing up on us is stronger than the force of gravity
19

Which one of the following is NOT an example of work being done?

A
the Moon orbiting Earth
B
pushing a box from the bottom of a hill to the top of the hill
C
pulling a sled across a field covered with snow
D
lifting a book bag off the floor
20

A light bulb converts electrical energy into both heat and light energy.

A
T
B
F

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