Physics Chapter 6
A ball with a momentum of 4.0 kg x m/s hits a wall and bounces straight back without losing any kinetic energy. What is the change in the ball's momentum?
-8.0 kg x m/s
As a bullet travels through the air, it slows down due to air resistance. How does the bullet's momentum change as a result?
The bullet's momentum decreases
A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.
The child has a greater momentum than the bike
A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. What happens to the first ball?
The first ball comes to rest
In a two-body collision, what happened to the momentum and kinetic energy?
The momentum is conserved
In an elastic collision between two objects with unequal masses, what happened to the momentum?
The momentum of one object will increase by the amount that the momentum of the other object decreases.
A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s. The momentum of the roller coaster does what?
The momentum of the roller coaster is greater downhill than uphill.
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, what happens?
The momentums are equal and opposite
What does the law of conservation of momentum state?
The total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects.
Tow billiard balls of equal mass are traveling straight toward each other with the same speed. They meet head-on in an elastic collision. What is the total momentum of the system containing the two ball before collision
The total momentum of the balls is zero
A student walks to a class at a velocity of 3 m/s. To avoid walking into a door as it opens, the student slows down to 0.5 m/s. Now late for class, the student runs down the corridor at 7 m/s. At what point in this scenario does the student have the least momentum?
When dodging the door
A 75 kg person walking around a corner bumped into a 80 kg person who was running around the same corner. What happens to the momentum of the 80 kg person?
decreased
Two billiard balls collide. What is the type of collision?
elastic collision
How can a small force produce a large change in momentum?
longer period of time
The impulse experienced by a body is equivalent to the body's change in what?
momentum
Two objects stick together and move with a common velocity. What is the type of collision?
perfectly inelastic collision
