forces - momentum Flashcards
1
Q
when do objects have momentum
A
when they are moving
2
Q
conservation of momentum?
A
in a closed system, the total momentum before an event is equal to the total momentum after the event
3
Q
rapid changes in momentum can be extremely ….
A
dangerous
4
Q
what do car manufactures use crash tests for
A
to test safety features such as seatbelts
5
Q
how can we reduce that danger
A
if we make the change in momentum happen over a longer period of time
6
Q
examples of safety devices which slow down momentum change
A
- air bags
- seta belts
- crash mat
- bike helmet
- cushioned surface
