Momentum
Impulse
Collisions
Conservation of Momentum
100
When the velocity of an object is halved, the momentum
is decreased by half
100
Impulse __________ times _______ and also equals ___________________
force, time, change in momentum
100
In this type of collision, objects tend to "stick" together.
inelastic
100
The law of conservation of momentum states that
p before is the same as p after
200
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
0.1 kg * m/s
200
A long barrel cannon fires a faster cannonball than a short cannon because the ball is given more
impulse
200
If two objects collide and stick together, what happens to their resulting velocity?
Velocity decreases
200
An unfortunate bug splatters on the windshield of a moving car. Which of these is the same in magnitude for the bug and the windshield?
a. force
b. impulse
c. change in momentum
d. all of the above
d - all of the above
300
An iron ball and wooden ball of the same size are dropped simultaneously from a cliff. Ignore air drag. When hitting the ground below, the iron ball has a greater
a. speed
b. acceleration
c. momentum
d. All of the above
c. momentum
(assume that steel has a larger mass)
300
A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. What impulse does the football experience?
6 N*s
300
A 10 kg toy truck moves at 5 m/s east. It collides head on with a 5 kg toy car moving at 10 m/s moving west. What is the total momentum of the system?
0 kg * m/s
300
The conservation of momentum is most closely related to
a. newton's 1st law
b. newton's 2nd law
c. newton's 3rd law
d. newton's law of gravity
C
400
A runner has a momentum of 670 kg*m/s and is traveling at a velocity of 9 m/s. What is his mass?
74.4 kg
400
Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid hitting a deer crossing the road. She strikes the air bag, that brings her body to a stop in 0.500 s. What average force does the seat belt exert on her?
-3500 N
400
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 stationery. The boxes stick together. What is the velocity of the two combined masses after collision?
8 m/s
400
If a monkey floating in outer space throws his hat away, the hat and the monkey will both
A) move away from each other, but at different speeds.
B) move away from each other at the same speed.
C) move a short distance and then slow down.
D) move a short distance and then go faster.
E) come to a stop after a few minutes.
A
500
How can the momentum of a speeding bullet be the same as the momentum of a supertanker moving toward a dock?
Because momentum is mass x velocity - a small mass with a large speed could equal the same as a large massed object traveling at a slower speed.
500
The balls have different masses and speeds. Rank the following from greatest to least impulse (use absolute value) needed to stop the balls 
B, D, C, A
500
A hungry fish is about to have lunch at the speeds shown. Assume the hungry fish has a mass 5 times that of the small fish. Immediately after lunch, rank the speed of the formerly hungry fish for each case greatest to least.
C, A, B
500
A 2-kg rifle that is suspended by strings fires a 0.01-kg bullet at 200 m/s. The recoil velocity of the rifle is about
A) 0.001 m/s.
B) 0.01 m/s.
C) 0.1 m/s.
D) 1 m/s.
E) none of these
D