P2 - Momentum & Collisions Flashcards
1
Q
What is the equation for momentum?
A
Momentum (kg m/s) = mass (kg) x velocity (m/s).
2
Q
The greater the mass and the greater the velocity, the _____ momentum it has.
A
More.
3
Q
What is a closed system?
A
A system where no external forces act.
4
Q
What is Conservation of Momentum?
A
Momentum before = momentum after.
5
Q
How does force affect momentum?
A
It changes it.
6
Q
Why are car crashes likely to cause injury?
A
The momentum changes quickly, causing large forces on the body.
7
Q
How do car safety features help?
A
They slow people down over a longer time.
The longer the momentum change, the smaller the force.
8
Q
What is momentum (p)?
A
A property of moving objects.
