1. Chapter 6 Objectives Identify different types of collisions.
Section 3 Elastic and Inelastic Collisions
Chapter 6
Objectives
Identify different types of collisions.
Determine the changes in kinetic energy during perfectly inelastic collisions.
Compare conservation of momentum and conserva-tion of kinetic energy in perfectly inelastic and elastic collisions.
Find the final velocity of an object in perfectly inelastic and elastic collisions.

2. Section 3 Elastic and Inelastic Collisions
Chapter 6
Collisions

3. Chapter 6 Elastic Collisions Elastic Collisions Momentum is Conserved
Section 3 Elastic and Inelastic Collisions
Chapter 6
Elastic Collisions
Elastic Collisions
Momentum is Conserved
Kinetic Energy is Conserved

4. total initial momentum = total final momentum
Section 3 Elastic and Inelastic Collisions
Chapter 6
Collisions
Inelastic collision
Momentum is Conserved
Kinetic Energy is not Conserved
Perfectly inelastic collision
Inelastic collision in which two objects stick together after colliding and move together as one mass
Conservation of momentum for a perfectly inelastic collision:
m1v1,i + m2v2,i = (m1 + m2)vf
total initial momentum = total final momentum

5. Perfectly Inelastic Collisions
Section 3 Elastic and Inelastic Collisions
Chapter 6
Perfectly Inelastic Collisions

6. Perfectly Inelastic Example
Section 3 Elastic and Inelastic Collisions
Chapter 6
Perfectly Inelastic Example
A railroad flatcar of mass 2,000 kilograms rolls to the right at 10 meters per second and collides with a flatcar of mass 3,000 kilograms that is rolling to the left at 5 meters per second. The flatcars couple together. What is their speed after the collision?

7. Chapter 6 Types of Collisions
Section 3 Elastic and Inelastic Collisions
Chapter 6
Types of Collisions