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Energy and Momentum Test Review

Total questions: 50

Worksheet time: 2hrs 49mins

Name
Class
Date
1.
Energy of motion is which type of energy?
a)

Potential

b)

Kinetic

c)

Sound

d)

Gravitational

2.

Gravitational potential energy depends on what?

a)

Mass and Velocity

b)

Mass and Weight

c)

Weight and Height

d)

Height and Distance

3.

Your body obtains energy from the food that you eat. What is the form of that energy?

a)

Kinetic

b)

Elastic

c)

Gravitational

d)

Chemical

4.

When an Archer bends back a bow, what type of energy is increased in the bow?

a)

Gravitational

b)

Elastic

c)

Kinetic

d)

Thermal

5.

Which of these describes the law of conservation of energy?

a)

No machine is 100% efficient

b)

Energy can neither be created, nor destroyed

c)

The energy resources of the Earth are limited

d)

The energy of a system is always decreasing

6.

As a roller coaster moves down a hill, gravitational potential energy is turned into Kinetic Energy, Thermal Energy, and Sound Energy. What is true about the total energy in the stystem?

a)

Energy is gained (created) as the coaster moves down the hill.

b)

Energy is lost (destroyed) as the roller coaster moves

c)

The total energy remains the same as the coaster moves

d)

The total amount of energy changes in some way while the roller coaster is moving

7.
Which type of energy transformation occurs when a flashlight shines?
a)
Chemical to thermal to electrical
b)
Chemical to electrical to radiant
c)
Thermal to chemical to radiant
d)
Chemical to electrical to sound
8.
A hairdryer converts -- 
a)
electrical energy into chemical
b)
electrical energy into thermal
c)
chemical energy into mechanical
d)
thermal energy into mechanical
9.
At which point will the skater have the least potential energy?
a)
Point A
b)
Point B
c)
Point C
d)
Point A and C
10.
At which point is kinetic energy greatest? 
a)
W
b)
X
c)
Y
d)
Z
11.
A what point does the water have the most gravitational potential?
a)
A
b)
B
c)
C
d)
There is no gravitational potential
12.

At point X. the kinetic energy is 50 J and the potential energy is 30 J. What is the total energy in the system once the car reaches the bottom of the ramp?

a)

A. 20 J, because the energy in the system cannot change form but can be created and destroyed

b)

B. 80 J, because the energy in the system can change form but cannot be created or destroyed

c)

C. 30 J, because the potential energy is the only energy at the bottom of the ramp

d)

D. 50 J, because the kinetic energy is the only energy at the bottom of the ramp

13.
both work and energy are measured in 
a)
joules
b)
newtons
c)
meters
d)
seconds
14.
if you lift a 2 kg box of toys to the top shelf of a closet that is 3 m high... how much PE will the box have
a)
58.8 J
b)
58.8 N
c)
6 J
d)
6 N
15.
A 40 newton object is released from a height of 10 m. Just before it hits the ground, its kinetic energy, in joules is?
a)
a. 400
b)
b. 3920
c)
c. 2800
d)
d. 4000
16.

A baseball player catches a moving ball. What happens to some of the ball's energy when it hits the player's mit?

a)

It changes to light.

b)

It changes to sound.

c)

It changes to electricity.

d)

It is destroyed.

17.

Abigail picks up a book she left by a sunny window. She notices the book is warm to the touch. What can Abigail conclude from her observation?

a)

Heat travels faster than light.

b)

Light can transfer energy to objects and heat them.

c)

Light travels faster than sound waves.

d)

Heat air produces light.

18.

A 200 kg boulder sits on top of a 203 m cliff. What is its P E when it reaches 100 m from the ground?

a)

A. 196,000 J

b)

B. 397,880 J

c)

C. 20,909 J

d)

D. 40,600 J

19.

A student decides to take up diving as a hobby. He stands on a high-dive that is 4 m tall. If the student has a mass of 50 kg, what is his P E?

a)

A. 200 J

b)

B. 1,960 J

c)

C. 12.5 J

d)

D. 800 J

20.
Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s.
a)
18 J
b)
36 J
c)
12 J
d)
6 J
21.

Things like friction and air resistance take away energy from a moving object, where does the energy they take away go?

a)

gravitational potential energy

b)

it dissapears and is no longer energy

c)

it is dissipated to things like heat and sound

22.
When plants convert the sun's energy into food, which type of energy is it?
a)
kinetic
b)
chemical
c)
thermal
d)
radiant
23.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
24.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
25.
45J of work were done on the object that moved 5M. How much force was applied to the object?
a)
8N
b)
225N
c)
9N
d)
0N
26.
Which of the following is work according to the scientific definition?
a)
pushing a box across the floor
b)
standing still while holding something heavy
c)
walking with a backpack on
d)
all of these are considered "work"
27.
The unit of power is the...
a)
work
b)
watt
28.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
29.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
30.
An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86,400 seconds (one day), how much work was done?
a)
1,356,490 J
b)
1,356,480 J
c)
1,356,470 J
d)
1,356,460 J
31.
W = 500 Joules 
t = 25 seconds
P = ???
a)
0.05 W
b)
20 W
c)
12500 W
d)
2000 W
32.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
33.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds.  How much power was used?
a)
360 W 
b)
60 W
c)
3600 W
d)
600 W
34.

If I carry a 50 kg sack of grain from the barn to the feeding trough (roughly 100 meters away), how much work did I do? Not counting lifting the sack up to my shoulder.

a)

5,000 J

b)

2 J

c)

150 J

d)

0 J

35.

states that if no external force acts on a group of objects, their total momentum does not change

a)

law of conservation of momentum

b)

Newton's 1st Law

c)

Newton's 2nd Law

d)

Newton's 3rd Law

36.

tendency of an object to resist any change in its motion

a)

inertia

b)

gravity

c)

free fall

d)

terminal velocity

37.

Which of the following is the formula for momentum?

a)

p = mv

b)

M = mv

c)

F = ma

d)

g = mc2

38.

Which of the following is the unit for momentum?

a)

kg·m/s

b)

kg·m

c)

kg·m/s2

d)

Momentum has no unit.

39.

Calculate the momentum of a 55-kg running back moving forward at 10 m/s.

a)

550 kg·m/s

b)

-550 kg·m/s

c)

5.5 kg·m/s

d)

-5.5 kg·m/s

40.

What must be the mass of a bowling ball rolled at 13 m/s if it has 42 kg⋅m/s of momentum?

a)

3.2 kg

b)

0.31 kg

c)

546 kg

d)

334 kg

41.

A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball.

a)

55 kg⋅m/s

b)

100 kg⋅m/s

c)

250 kg⋅m/s

d)

500 kg⋅m/s

42.
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together.  What type of collision did he observe?
a)
Elastic
b)
Inelastic
c)
Completely inelastic
d)
none
43.
While playing pool, Emma notices that the pool balls bounce apart.  What type of collision is this?
a)
Elastic
b)
Inelastic
c)
Explosive
d)
Force
44.

Collisions where objects BOUNCE apart.

a)

inelastic collisions

b)

elastic collisions

c)

explosions

d)

none of these

45.

Momentum before = Momentum after


according to the Law of Conservation of __________________________.

a)

Momentum

b)

Energy

c)

Force

d)

Acceleration

46.

Two Pool Balls collide and then go separate directions.

a)

inelastic collision

b)

elastic collision

c)

explosion

d)

none of these

47.

Collision where objects collide, and stick together.

a)

inelastic collision

b)

elastic collision

c)

explosion

d)

none of these

48.

What is the TOTAL MOMENTUM for the system BEFORE COLLISION?

a)

14 Kg x m/s

b)

10 Kg x m/s

c)

24 Kg x m/s

d)

-24 Kg x m/s

49.
A 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball. If the first ball is at rest after the collision, what is the velocity of the second ball? 
a)

2.1 m/s

b)

2.5 m/s

c)

4.2 m/s

d)

8.4 m/s

50.
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
a)

2 m/s

b)

8 m/s

c)

-2 m/s

d)

1.5 m/s

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