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WorksheetsQuiz - Chapter 8: Momentum and Collisions (2/17)
Total questions: 25
Worksheet time: 41mins
While playing pool, the white cue ball strikes the 8-ball in an elastic collision. 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?
2 m/s
8 m/s
-2 m/s
1.5 m/s
When comparing the momentum of two moving objects, which of the following is correct?
the object with the higher velocity will have less momentum if the masses are equal
the more massive object will have less momentum if its velocity is greater
the less massive object will have less momentum if the velocities are the same
the more massive object will have less momentum if the velocities are the same
A 75-kg person walking around a corner bumped into an 80-kg person who was running around the same corner. The momentum of the 80-kg person...?
increased
decreased
remained the same
was conserved
Two skaters stand facing each other. One skater's mass is 60 kg, and the other's mass is 72 kg. If the skaters push away from each other without spinning,
the lighter skater has less momentum
their momenta are equal but opposite
their total momentum doubles
their total momentum decreases
Two objects stick together and move with a common velocity after colliding. Identify the type of collision.
(a)
A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. After the collision, which of the following is true of the first ball?
it maintains its initial velocity
it has one-half its initial velocity
it comes to rest
it moves in the opposite direction
A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair
was zero while stationary and increased when the person stood.
was greatest while the person sat in the chair.
remained the same.
was zero when the person got out of the chair and increased while the person sat.
Two objects with different masses collide and bounce back after an elastic collision. Before the collision, the two objects were moving at velocities equal in magnitude but opposite in direction. After the collision,
the less massive object had gained momentum
the more massive object had gained momentum
both objects had the same momentum
both objects lost momentum
A 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball in an elastic collision. If the first ball is at rest after the collision, what is the velocity of the second ball after the collision?
(a)
A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. What is the velocity of the truck after the collision?
10 m/s
0 m/s
5 m/s
2 m/s
What is the the total momentum of the red and blue ball before the collision?
16 kg m/s
32 kg m/s
2 kg m/s
6 kg m/s
A dart with a mass of 0.5 kg is thrown at 15 m/s and sticks into a 1kg apple hanging on a string. What is the velocity of the dart and apple just after the dart is embedded?
0 m/s
5 m/s
10 m/s
15 m/s
A 3.0 kg ball of clay traveling at 10 m/s collides with a 20 kg ball of clay traveling in the same direction at 2.0 m/s. What is their combined speed if the two balls stick together when they touch?
70 m/s
3.0 m/s
1.9 m/s
1.0 m/s
The principle of conservation of momentum: (Choose all the correct answers.)
momentum before is not always the same as momentum after.
If no net external forces, the total momentum in a system remains unchanged.
the total momentum in a system changes.
If no net external forces, the total initial momentum in a system is equal to the total final momentum of the system.
What are the different types of collisions?
elastic
imperfectly inelastic
inelastic
imperfectly elastic
