WorksheetsMomentum, Impulse, and Collisions
Total questions: 40
Worksheet time: 3hrs 20mins
Name
Class
Date
1.
In an elastic collision, ______ is conserved.
a)
Momentum only
b)
Kinetic Energy only
c)
Both momentum and energy
2.
Most modern vehicles have padded dashboards. This reduces collision injuries by...
a)
reducing the driver's change in momentum
b)
increasing the driver's change in momentum
c)
increasing the force of impact
d)
increasing the time of impact
3.
In a perfectly inelastic collision, ______ is conserved.
a)
Momentum only
b)
Kinetic Energy only
c)
Both momentum and kinetic energy
4.
A person on a stationary skateboard throws a bowling ball with a velocity of 5.0 m/s. What is a possible speed of the person after the throw?
a)
0 m/s
b)
1.5 m/s
c)
5.0 m/s
d)
7.5 m/s
5.
The recoil speed of a rifle is much less than the exit velocity of a bullet because...
a)
the rifle experiences a smaller force
b)
the rifle experiences a smaller change in momentum
c)
the rifle has a much greater mass
d)
the rifle does not obey the laws of physics
6.
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
7.
Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...
a)
Skater 1 experiences a greater change in momentum
b)
Skater 2 experiences a greater change in momentum
c)
Skater 1 has a greater speed than Skater 2
d)
Skater 1 experiences a greater force
8.
What happens to the speed of the wagon as the rain collects inside of it?
a)
it decreases
b)
it remains constant
c)
it increases
9.
A block sliding on a frictionless surface runs into a second block of equal mass at rest. After the two collide, they stick together and travel with a velocity...
a)
that is twice the magnitude of the original velocity
b)
that is half the magnitude of the original velocity
c)
more information is needed
10.
Parkour Peter bends his knees upon landing in order to ____
a)
reduce his change in momentum
b)
increase his change in momentum
c)
increasing his landing time
d)
increasing his landing force
11.
Both students experience the same ____
a)
force of impact
b)
time of impact
c)
change in momentum
d)
all of the above
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 northward at 20 m/s.........
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
14.
The definition of momentum is
a)
Mass in Motion
b)
The size of an object
c)
The velocity of an object
d)
A comparison between two objects
15.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
16.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
17.
What is Newton's Third Law?
a)
Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
b)
Force = mass x acceleration
c)
For every action there is an equal and opposite reaction
18.
A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. At what speed will the second boxcar move?
a)
18.6 m/s
b)
9.3 m/s
c)
7.5 m/s
d)
1.86 m/s
19.
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
20.
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
21.
Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:
a)
2 m/s
b)
3.4 m/s
c)
4.6 m/s
d)
7.1 m/s
22.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
23.
Which of the following has the least amount of momentum?
a)
An ant walking along the ground
b)
An ant at rest
c)
An elephant walking
d)
An elephant running
24.
Which of the following images has more momentum?
a)
Object A
b)
Object B
c)
They are the same
25.
If two objects have the same mass, then the faster moving object has ____________ momentum.
a)
more
b)
less
c)
the same
26.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision. What is the velocity of the second ball after the collision?
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
27.
A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.
Calculate the impulse on the ball.
a)
1 N*s
b)
6 N*s
c)
33.3 N*s
d)
None of these
28.
The impulse is ______ the change in momentum
a)
Greater than
b)
Equal to
c)
less than
d)
always double
29.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than
b)
less than
c)
equal to
d)
unrelated to
30.
What is the unit for velocity?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
31.
Softer landings tend to
a)
increase impact force
b)
increase force
c)
increase collision time
d)
increase change in momentum
32.
The units for Impulse are
a)
N/s
b)
N.s
c)
N
d)
m/s
33.
The purpose of crumble 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.
34.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes
d)
the impulse on an object is less than the change in momentum it causes
35.
A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's velocity?
a)
6.3 m/s
b)
3.2 m/s
c)
1.2 m/s
d)
4.33 m/s
36.
If an air bag changes a 60 kg person's speed from 40.0 m/s to 0.0 m/s, what impulse must act on the person?
a)
2400 kg.m/s
b)
1.5 kg.m/s
c)
0.67 kg.m/s
d)
1500 kg.m/s
37.
Which takes more force to catch, a bowling ball or a ping pong ball?
a)
bowling ball because it has more momentum
b)
ping pong ball because it has more momentum
c)
both require the same amount of force when catching
d)
bowling ball because it has less momentum
38.
An object with a mass of 2000 kg at rest has what momentum?
a)
2000 kg m/sec
b)
0 kg m/sec
c)
2000 kg
d)
2000 m/sec
39.
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
40.
Sally runs and jumps off of a diving board and lands on a tube (she stays in the tube). The collision between Sally and the tube is
a)
Elastic
b)
Inelastic
c)
Perfectly Inelastic
d)
Completely absurd
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