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Unit 3: Momentum and Impulse Review

Total questions: 22

Worksheet time: 34mins

Name
Class
Date
1.

If you double your velocity, your momentum

a)

doubles

b)

triples

c)

stays the same

d)

decreases.

2.

Velocity is a vector with both magnitude and direction. If momentum = mass x velocity, momentum must be a

a)

scalar

b)

vector

c)

neither

3.

In a closed system, a particle going 300 m/s collides with a second particle of equal mass at rest. The particles do not stick. The velocity of the second particle after the collision will be

a)

0 m/s

b)

150 m/s

c)

300 m/s

d)

600 m/s

4.

The momentum of an object at rest is

a)

0 m/s

b)

0 kg

c)

0 kg x m/s

d)

equal to the potential energy

5.

Calculate the momentum of a 2 kg book sliding on a frictionless surface at 2 m/s.

a)

2 kg x m/s

b)

4 kg x m/s

c)

0 kg x m/s

d)

1 kg x m/s

6.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
7.
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
a)
car
b)
bike
c)
they are equal
d)
cannot determine using the info provided
8.
A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
a)
14.4 kg
b)
1400 kg
c)
144 kg
d)
360 kg
9.
A 2 kg cart has a momentum of 10 kg m/s. What is its velocity?
a)
22 m/s
b)
.2 m/s
c)
5.0 m/s
d)
20 m/s
10.
The impulse is ______ the change in momentum
a)
Greater than
b)
Equal to
c)
less than
d)
always double
11.
How can a tennis ball and a bowling ball have the same momentum?
a)
have the same speed
b)
have different speeds
c)
one is moving backwards
d)
they can't
12.

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

13.
T/F:  A big truck will always have more momentum than a small car.
a)
True
b)
False
14.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
15.

The graph above shows the force experienced by a cell phone after being dropped on the floor and after being caught by the owner's foot. Which line represents the force of the floor?

a)

Purple (taller line)

b)

Red (shorter line)

16.

When two ice skaters are initially at rest and push off one another, their momentums are

a)

equal in magnitude and direction

b)

equal in magnitude and opposite in direction

c)

same direction, different magnitudes

d)

in opposite directions and possibly of different magnitudes n opposite directions and possibly of different magnitudes

17.

When a golf club hits a ball, the ΔP of the golf club is _ to the ΔP of the ball.

a)

less than

b)

equal to

c)

greater than

d)

none of these

18.
You can use an impulse to stop an egg without breaking it by applying a
a)
small force over a longer time
b)
small force over a shorter time
c)
large force over a longer time
d)
large force over a shorter time
19.
The purpose of crumple zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
20.
If two objects collide and stick together, what will happen to their overall momentum?
a)
momentum will decrease
b)
momentum will increase
c)
momentum will stay the same
d)
none of the above
21.
How do the following variables change if you drop an egg on a pillow rather than cement?
a)
constant impulse, increasing time, decreasing force
b)
increasing impulse, increasing time, increasing force
c)
constant impulse, increasing time, increasing force
d)
decreasing impulse, decreasing force, increasing time
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