1.4 - Momentum and impulse Flashcards
1
Q
What is momentum?
A
The product of mass and velocity
2
Q
What is an elastic collision?
A
A collision where both momentum and kinetic energy are conserved
3
Q
What is an inelastic collision?
A
A collision where momentum is conserved, but kinetic energy is not
4
Q
What is impulse?
A
The change in momentum (Ns)
5
Q
What is the law of momentum?
A
Total momentum before = Total momentum after
m1u1 + m2u2) = (m1v1 + m2v2
6
Q
How do you calculate the kinetic energy before a collision and then after it?
A
- Ek before = 1/2m1u1^2 + 1/2m2u2^2
* Ek after = 1/2m1v1^2 + 1/2m2v2^2
7
Q
What is the conservation of energy?
A
1/2mv^2 = mgh
