Physics Chapter 6
A ball with a momentum of 4.0 kg.m/s hits a wall and bounces straight back without losing any kinetic energy. What is the change in the ball's momentum?
-8.0kg.m/s
Which of the following situations is an example of a visible change in momentum?
A baseball is hit by a bat
If a force is exerted on an object, which statement is true?
A small force applied over a long time interval can produce a large change in the object's momentum
Which of the following equations can be used to directly calculate the change in an object's momentum?
Delta p=F delta t
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 comes to rest
When comparing the momentum of two moving objects, which of the following is correct
The less massive object will have less momentum if the velocities are the same
A 20 kg shopping cart moving at a velocity of 0.5 m/s collides with a store wall and stops. The momentum of the shopping cart
decreases
Two billiard balls collide. Identify the type of collision.
elastic
Two objects move separately after colliding, and both the total momentum and total kinetic energy remain constant. Identify the type of collision
elastic
What are the SI units for momentum?
kg.m/s
The impulse experienced by a body is equivalent to the body's change in
momentum
In a two-body collision,
momentum is always conserved
Which of the following best describes momentum of two bodies after a two-body collision if the kinetic energy of the system is conserved?
must also be conserved
Which of the following equations can be used to directly calculate an object's momentum, p?
p =mv
Two objects stick together and move with a common velocity after colliding. Identify the types of collision.
perfectly elastic
A rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s. The magnitude of the momentum of the rubber ball
remained the same
A soccer ball collides with another soccer ball at rest. The total momentum of the balls
remains constant
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 leess massive object had gained momentum
In an elastic collision between two objects with unequal masses
the momentum of one object will increase by the amount that the momentum of the other object decreases
The change in an object's momentum is equal to
the product of the force applied to the object and the time interval
Thee law of conservation of momentum states that
the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects
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.
their momentum is equal but opposite
A billiard ball collides with a second identical ball in an elastic head-on collision. What is the kinetic energy of the system after the collision compared with the kinetic energy before the collision?
unchanged
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
