Momentum Review Energy Intro Momentum ImpulseMomentum Examples of

Momentum • • • Review Energy, Intro Momentum Impulse-Momentum Examples of Impulse-Momentum Conservation of Momentum Inelastic, Elastic, and Indeterminate Collisions Indeterminate Collision Examples

Energy vs. Momentum • Energy – Useful with conservative forces – where work only depends on difference of 2 endpoints. • Momentum – Useful in collisions – where objects exert equal and opposite forces by action-reaction.

Vectors vs. Scalars • Chapter 2 – kinematics VECTOR • Chapter 3 – 2 -D kinematics VECTOR • Chapter 4 – Newton’s Laws VECTOR • Chapter 5 – Circular Motion VECTOR • Chapter 6 - Energy SCALAR • Chapter 7 - Momentum VECTOR – (we only do in one dimension)

Review of Work/Energy •

Intro to Impulse/Momentum • momentum impulse

Use of Momentum • F 12 = force on 1 due to 2 1 2

Impulse/Momentum Example 1 •

Impulse/Momentum Example 2 •

Impulse/Momentum Example 3 A 0. 145 kg baseball pitched at 39 m/s is hit on a horizontal line drive straight back toward the pitcher at 52 m/s. If the contact time between the bat and ball is 3 ms, calculate the average force on ball and bat during the hit. • -39 m/s 52 m/s

Use of Momentum • F 12 = force on 1 due to 2 1 2

Conservation of Momentum •

Case 1 – More Info •