1. Ch. 6 Momentum and Impulse

2. Collisions
Two objects collide and momentum is transferred between them
Two types
Elastic
Inelastic

3. Elastic Collisions m1v1i + m2v2i = m1v1f + m2v2f
Two objects collide and move separately
m1v1i + m2v2i = m1v1f + m2v2f
1st object nd object st object nd object
initial initial final final
momentum momentum momentum momentum

4. A 0. 215 kg golf club is swung with a speed of 55
A kg golf club is swung with a speed of 55.0 m/s and strikes a kg golf ball at rest. After the collision, the club travels at a speed of 43.0 m/s. What is the speed of the golf ball just after the impact?

5. Inelastic Collision m1v1i + m2v2i = (m1 + m2)vf
Two objects collide and stick together
m1v1i + m2v2i = (m1 + m2)vf
1st object nd object (1st object + 2nd object)
initial initial final
momentum momentum momentum

6. A 0.25 kg arrow with a velocity of 12 m/s to the west strikes the center of a 6.9 kg target. What is the final velocity of the combined mass?

7. A 90. 0 kg fullback moving south with a speed of 5
A 90.0 kg fullback moving south with a speed of 5.0 m/s has an inelastic collision with a 95.0 kg opponent running north at 3.0 m/s. What is the velocity of the players just after impact?