Conservation of momentum

# Conservation of momentum

## Conservation of momentum

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
##### Presentation Transcript

1. Conservation of momentum • Circus physics video

2. Conservation of Momentum • The Law of Conservation of Momentum: In the absence of an external _____________, the momentum of a system remains _________________. • Remember, ____________ causes momentum to _____________ • Important for ___________ and ____________

3. Conservation of Momentum • BEFORE Total _________________ didn’t change • AFTER

4. Elastic Collisions • When objects collide without being permanently _______________ and without generating ________. (Bouncing) • Perfectly elastic collisions are not common in the everyday world- some heat is produced in the collisions. m1v1 + m2v2 = m1v1+ m2v2

5. Inelastic Collisions • Inelastic Collisions: objects collide and become tangled or _________ ____________, generating heat and becoming ____________ in the process. (Sticking) • m1v1 + m2v2 = (m1+ m2)v

6. Recoil • The opposite of a collision: 2 objects ____________ each other apart. • Example: a bullet is fired from a gun • Both start from rest, so total momentum = __ • Bullet moves forward (__________ momentum) • gun moves backward (__________ momentum) • They add up to _____________, so total momentum didn’t change Equation is the same as _____________ collision