1. Elastic and Inelastic Collisions 6.3

4. Perfectly Inelastic Collisions When two objects collide and move with each other after.

6. Practice Problems 6E, 1-5, p. 224: 1.A 2.A 3.A 4.A 5.a. b.

7. Kinetic energy is not constant in inelastic collisions KE converted to sound and internal energy as objects deform. Decrease in KE can be calculated using 0.5mv 2

8. Practice Problems 6F, 1-5, p. 226: 1.a. b. 2.a. b. 3.a. b.

9. Elastic Collisions After collision: –Two objects Remain separate. Remain same shape after collision. –Both momentum and KE remain the same

10. Most collisions are neither elastic nor perfectly inelastic. –Most objects in an inelastic collision do not stick. –In near elastic collisions, objects lose energy to internal energy and sound.

11. KE is conserved in an elastic collision. If purely elastic both p and KE remain constant before, during, and after the collision.

12. Practice Problems 6G, 1-4, p. 229: 1.a. b. 2.a. b. 3.a. b. 4.a. b.