1. Types of Collisions
Elastic collisions-Two objects collide, temporarily misshape, and spring away from each other…
KE and momentum are conserved.
Inelastic collisions conserve momentum but not KE…some energy is lost to non-conservative forces such as thermal energy/friction.
Perfectly inelastic collisions require that the 2 objects are combined as a unit after the collision.

2. 7-7 Collisions in 2 or 3 dimensions
In these problems, you must use trig functions and the Pythagorean Theorem to solve for components.
See sample Example 7-10

3. Homework
Page and due BOP next