1. Momentum
momentum - property of all moving objects; a vector quantity defined as an object's mass times its velocity
from: F = ma
F = mDv Dt
using algebra: FDt = mDv
impulse momentum
momentum p =mDv units: kg*m/s
=m(Vf - Vi)

2. Conservation of Momentum
Law of conservation of momentum
- total momentum of all objects interacting with one another remains constant. Initial momentum is equal to final momentum.
m1v1,i + m2v2,i = m1v1,f + m2v2,f
total initial momentum = total final momentum
Kinetic energy remains the same. No energy is lost.

4. Conservation of Momentum
elastic collisions - a collision between two objects where the objects "bounce off" or remain separate from each other after the collision.
m1v1,i + m2v2,i = m1v1,f + m2v2,f

5. Conservation of Momentum
inelastic collisions - a collision between two objects where the objects remain "stuck" or connected together after the collision.
Kinetic energy is lost to other forms of energy.
m1v1,i + m2v2,i = (m1+ m2)vf

6. Inelastic collision

7. Elastic or inelastic?

8. Elastic or inelastic?

9. Now you give me two problems for inelastic and two for elastic.
Include a word problem and diagram as well as the solutions. You can pair up. Be creative! EXTRA POINTS FOR EXTRA IMAGINATION!