p250c1

1
Chapter 8 Applying Conservation Laws
Elastic collisions conservation of KE
conservation of momentum in one dimension
2
Target (m2) initially at rest ? v2 0
3
Example Two boxcars on railroad tracks are
moving in the same direction. The rear car has
twice the speed but half the mass as the second
car. What is the velocity of each car if the
collision is elastic? (plug into results, text
does this that hard way!)
Skip section 8.3 Elastic collisions in two
dimensions
4
Gravitational Potential Energy and Newtons Law
of Universal Gravitation