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Energy and Momentum Practice Quiz

Total questions: 70

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
2.

The equation to calculate momentum is

a)

p = m x v

b)

p = 1/2 m x v2

c)

p = m x g x h

d)

p = m x g

3.

What is the unit for momentum?

a)

m/sec

b)

kg/sec

c)

kg/m

d)

kg x m/sec

4.
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
5.

If an object has a momentum of 40 kg x m/s and a mass of 60 kg, what is it's velocity?

a)

2400 m/s

b)

1.5 m/s

c)

240 m/s

d)

.67 m/s

6.

In order for an object to have momentum it must be ________

a)

moving

b)

motionless

c)

alive

d)

asleep

7.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
8.
What is the momentum of a charging rhino?
a)
2 × 10² kg⋅m/s
b)
3 × 10² kg⋅m/s
c)
2 × 10⁴ kg⋅m/s
d)
3 × 10⁴ kg⋅m/s
9.
Which object has the greatest momentum?
a)
Object A
b)
Object B
c)
Object C
d)
cannot be determined
10.

At what speed do the two blocks move after the collision?

a)

2 m/s

b)

5 m/s

c)

10 m/s

11.
When two objects collide, the Momentumbefore is ____________ the Momentumafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
12.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
13.
Determine the momentum of 1000-kg car moving southward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s south
d)
10000 kg * m/s south
14.
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
a)
0.1 kg-m/s
b)
1 kg-m/s
c)
10 kg-m/s
d)
100 kg-m/s
15.
A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?
a)
0 kgm/s
b)
30 kgm/s
c)
50 kgm/s
d)
10 kgm/s
16.
A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg,  collides with a smaller box with a mass of 2 kg that is stationary.  The boxes stick together. What is the velocity of the two combined masses after collision?
a)
0 m/s
b)
4 m/s
c)
8 m/s
d)
12 m/s
17.
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
a)
25 m/s
b)
375 m/s
c)
25 kg m/s
d)
375 kg m/s
18.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
19.
In this type of collision, objects tend to "stick" together.
a)
elastic
b)
inelastic 
c)
They "stick" together in both types of collisions
20.
A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less
a)
momentum
b)
velocity
c)
mass
21.
An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be 
a)
0 m/s
b)
1 m/s
c)
2 m/s
d)
4 m/s
22.
A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?
a)
0 kgm/s
b)
30 kgm/s
c)
50 kgm/s
d)
10 kgm/s
23.
In any collision (crash) the ______ is ALWAYS constant.
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
24.
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
a)
0.5 m/s
b)
1.0 m/s
c)
0.33 m/s
d)
0.67 m/s
25.

The momentum of a 0.20 kg ball going towards a batter is 8.2 kg m/s. The hitter strikes the ball with his 1.4 kg bat. If the bat travels at in the direction of the ball after the strike at 3.4 m/s, what is the momentum of the bat after the collision?

a)

8.1 joules

b)

-8.2 kg m/s

c)

1.3 kg m/s

d)

-4.8 kg m/s

26.

The momentum of a 0.20 kg ball going towards a batter is 8.2 kg m/s. The hitter bunts the ball with his 1.4 kg bat. If the bat travels at in the direction of the ball after the bunt at 10.25 m/s, what is the total momentum of the system after the collision?

a)

8.2 kg m/s

b)

20.4 kg m/s

c)

-6.15 kg m/s

d)

14.35 kg m/s

27.

A 2,250 kg Tesla going 15.0 m/s collides with a parked 3,190 kg Dodge Ram. During the collision they stick together as they deform. The two vehicles then travel at 6.20 m/s.


What is the momentum of the Tesla before the crash?

a)

14,000 kg m/s

b)

19,800 kg m/s

c)

33,800 kg m/s

d)

47,900 kg m/s

28.

A 2,250 kg Tesla going 15.0 m/s collides with a parked 3,190 kg Dodge Ram. During the collision they stick together as they deform. The two vehicles then travel at 6.20 m/s.


What is the momentum of the Dodge Ram before the crash?

a)

0 kg m/s

b)

14,000 kg m/s

c)

19,800 kg m/s

d)

33,800 kg m/s

29.

When you sneeze you release tiny (mostly) water droplets. These droplets can travel at extream speeds from 75 km/hr to 1045 km/hr. Let's assume that you sneeze 0.549 g of droplets at a speed of 44.7 m/s. What is the momentum of the sneeze?

a)

24.5 kg m/s

b)

159 kg m/s

c)

0.0245 kg m/s

d)

0.159 kg m/s

30.

When you sneeze you release tiny (mostly) water droplets. As the sneeze leaves your head it must impart momentum on you. If your head is about 4.75 kg and the momentum of the sneeze was about 0.245 kg m/s, what speed will your head travel from the kick back?

a)

0.323 km/hr

b)

0.186 km/hr

c)

1.16 km/hr

d)

19.4 km/hr

31.

When comparing the momentum of two moving objects, which of the following is correct?

a)

the object with the higher velocity will have less momentum if the masses are equal

b)

the more massive object will have less momentum if its velocity is greater

c)

the less massive object will have less momentum if the velocities are the same

d)

the more massive object will have less momentum if the velocities are the same

32.

A bow has a mass of 3 kg and the arrow has a mass of 0.9 kg. If the velocity of the arrow is 125 m/s after it was launched, what is the recoil velocity of the bow?

a)

m1v1i+m2v2i=m1v1f+m2v2fm_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}

b)

m1v1i+m2v2i=(m1+m2)vfm_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f

c)

0=m1v1+m2v20=m_1v_1+m_2v_2

d)

p=mvp=mv

e)

J=mΔvJ=m\Delta v

33.

Giselle and Brock were hanging out one afternoon. Giselle rolled a 5 kg bowling ball down the sidewalk to the east at 7 m/s. At the same time, Brock threw a piece of 3.8 kg clay to the west and the two objects collide. If both objects come to rest immediately after the collision, what was the speed of the clay before hitting the bowling ball?

a)


0=m1v1+m2v20=m_1v_1+m_2v_2

b)

m1v1i+m2v2i=(m1+m2)vfm_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f

c)

0=m1v1+m2v20=m_1v_1+m_2v_2

d)

Ft=mΔvFt=m\Delta v

e)

J=FtJ=Ft

34.

what 2 factors does kinetic energy depend on?

a)

- Mass of the object (m)

- Speed the object is moving (v)

b)

- Mass of the object (m)

- Weight of the object (W)

c)

- Speed of the object (v)

- Weight of the object (W)

d)

- Weight (W)

- velocity (V->)

35.

a minivan and a transport truck are going at the same speed, which has more kinetic energy? explain your answer.

4 lines
36.

There are 2 cars of the same mass. One is going 40km/hr and the other is going 70km/hr, which has more kinetic energy? explain your answer.

4 lines
37.

Kinetic energy is directly proportional to speed squared. That means that if the speed is multiplied by 3, the kinetic energy is multiplied by (a)  

38.

kinetic energy is directly proportional to mass. That means that if mass is divided by 2, kinetic energy would be divided by (a)  

39.

A mass, m, has 30 J of energy when it is moving at a speed of v. the energy of a mass that is four times m is (a)   , if it is moving at the same speed, v. (put units!)

40.

A mass, m, has 50 J of energy when it is moving at a speed of v. The energy of the mass is (a)   if the speed triples. (put units!)

41.

A 50 kg student is running at a speed of 4.0 m/s. 

How much kinetic energy does the student have?

4 lines
42.

A 900 kg car is driving at a speed of 30 km/hr. How much kinetic energy does it have?

4 lines
43.

A pro golfer can hit a 45 g golf ball so that it has an initial speed of 90 m/s. How much kinetic energy does the golf ball have?

4 lines
44.

How fast is a 20 kg dog running if it has 250 J of kinetic energy?

4 lines
45.

A 55 kg cyclist is biking at a speed of 6.0 m/s. What is the mass of the bicycle if the cyclist & bicycle together have 1170 J of kinetic energy?

4 lines
46.

A 80.0 kg person runs with a speed of 7.00 m/s. A tennis ball (m=0.056kg) has to go to (a)   have the same amount of kinetic energy as the person. (units!)

47.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

48.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

49.

Which would have the LEAST gravitational potential energy (GPE)?

a)

A ball sitting on the ground

b)

Moon viewed from the Earth

c)

An airplane flying 30,000 feet above the ground

d)

A rock sitting on top of Mt. Everest

50.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

51.

How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?

a)

Decrease the object's mass

b)

Increase the object's height

c)

Increase the object's mass

d)

Decrease the object's height

52.

____________ is the ability to do work.

a)

Energy

b)

Force

c)

Friction

d)

Motion

53.

When you are holding a book, energy is stored between the book and Earth; this type of energy is called ________ potential energy.

a)

Kinetic Energy

b)

Chemical Energy

c)

Gravitational Potential Energy

d)

Electric Energy

54.

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

55.

At which position does the child on the swing have the most gravitational potential energy?

a)

W

b)

X

c)

Y

d)

Z

56.

Which of the following is the correct equation for calculating an object's gravitational potential energy?

a)

PE = mgh

b)

PE = mg / h

c)

PE = mg + h

d)

PE = gh

57.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s2

a)

9.8 Joules

b)

1.0 Joule

c)

0.10 Joule

d)

11.8 m/s2

58.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

59.

How could you increase the gravitational potential energy of an object without changing its mass or the planet's gravitational force.

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

60.

Which is the correct unit for expressing gravitational potential energy?

a)

Joule

b)

Newton

c)

m/s2

d)

meter

61.

An object is being lifted 2m with a force of 25N exerted upwards on the object. How much work is being done on the object?

a)

50J

b)

25J

c)

-50J

d)

0J

62.

Which of these scenarios is the most work done?

a)

A crane does work by lifting a steel beam exerting 5000N of force lifting it 5m off the ground.

b)

A person does work on a shopping cart by exerting a force 12N down the 10m long isle.

c)

A truck does work as it pulls a trailor exerting a force of 100N over 1000m as it drives down the road.

d)

An elevator does work by lifting some passengers up in a building exerting 3000N of force lifting them 8m.

63.

At which point on the roller coaster is the gravitational potential energy the greatest?

a)

W

b)

X

c)

Y

d)

Z

64.

If you push a cart with a force of 60 N for 2 m... how much work have you done?

a)

120 J

b)

30 J

c)

120 N

d)

30 N

65.

A major league pitcher can throw a baseball with a kinetic energy of 150 J. How much work must the pitcher do to the ball to give it that much KE?

a)

150 J

b)

0

c)

Can’t tell without knowing the mass of the ball

66.
Sue lowers a stack of books with a mass of 20 kg over a distance of 2 meters.  Calculate work.
a)
400 J
b)
-40 J
c)
-400 J
d)
-20 J
67.

Which object will have the largest Gravitational Potential Energy?

a)
b)
c)
d)
68.

An object's gravitational potential energy store can be increased by...

a)

by lifting the object higher

b)

increasing the velocity (speed) of the object

c)

decreasing the size of the object

d)

decreasing the mass of the object

69.

An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump?

Let g = 9.8N/kg

a)

24 m

b)

161,540 m

c)

2.5 m

d)

201 m

70.

The world record for pole vaulting is 6.15 m. The pole vaulter’s gravitational potential energy is 4942 J, what is his mass?

Let g = 9.8N/kg

a)

803.6 kg

b)

504.3 kg

c)

30,393.3 kg

d)

82 kg

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