Changes in Momentum Flashcards
1
Q
Explain why very large decelerations can be dangerous.
A
- Very large decelerations can cause serious injuries because a large force acts on a person
- A large acceleration requires a large force (since F = ma)
2
Q
How can the danger of large decelerations be reduced?
A
The force can be lowered by slowing the object down over a longer time
3
Q
Used as Newton’s second law, what is the equation that links force, change in momentum and time?
A
4
Q
List 3 safety features in vehicles that are designed to reduce the risk of injury from large decelerations.
A
- Air bags
- Seat belts
- Crumple zones
