Chapter 7 - Impulse and Momentum Flashcards
1
Q
What happens when a ball bounces?
A
- When it reaches the floor, its velocity quickly changes direction
- There must be a strong force exerted on the ball by the floor during the short time they are in contact.
- This force provides the upward acceleration necessary to change the direction of the ball’s velocity
2
Q
What is impulse equal to?
A
Impulse = Change in momentum (𝛥p)
F 𝛥t = m 𝛥v
3
Q
What is the Impulse-Momentum Principle?
A
The impulse acting on an object produces a change in momentum of the object that is equal in both magnitude and direction to the impulse
4
Q
How is recoil caused?
A
When a force between two objects causes the objects to move in opposite directions
5
Q
A collision in which the objects stick together after collision is called a?
A
perfectly inelastic collision
6
Q
What causes a perfectly inelastic collision?
A
- Energy isn’t conserved
7
Q
What causes a perfectly elastic collision?
A
- Energy isn’t lost
8
Q
What causes a partially inelastic collision?
A
- some energy is lost, but the objects do not stick together
