momentum Flashcards
1
Q
what is momentum and how is it calculated
A
Momentum depends on the mass of an object and its velocity. It can be calculated using this equation:
momentum=mass×velocity
The unit of momentum is kg × m/s = kg m/s.
2
Q
momemntum is aaaaaaa
A
vector quantity
it has size and direction
3
Q
how to find force
A
force= change in momentum/time
4
Q
safety features
A
This can also be explained in terms of momentum; crumple zones and air bags increase the time it takes to stop a passenger in a collision. The momentum changes over an increased time, meaning the force acting to stop the passenger is smaller.
5
Q
the law of conservation
A
the total momentum before and after an interaction are equal, provided that no external forces are acting on the objects.
