1. Welcome Physics Pick up the two handouts at the front
You will need to pick up your calculator
Get your momentum notes

2. A 2 kg blob of putty moving at 4 m/s slams into a 6 kg blob of putty at rest. What is the speed of the two stuck-together blobs immediately after colliding?

3. A 4-kg ball traveling westward at 25 m/s hits a 15-kg ball at rest
A 4-kg ball traveling westward at 25 m/s hits a 15-kg ball at rest. The 4-kg ball bounces east at 8.0 m/s. What is the speed and direction of the 15-kg ball?
m2 = 15-kg
v2 = 0
v2f = ?
m1 = 4-kg
v1= -25 m/s
vf= 8.0 m/s

4. A 1000 kg car is rolling down the street at 2. 5 m/s
  A 1000 kg car is rolling down the street at 2.5 m/s. How fast would a 2500 kg car have to collide into it in order to bring it to rest (0 m/s)?

5. A railroad car slams into another railroad car and couples together
A railroad car slams into another railroad car and couples together. What is the combined speed of the railroad cars after the collision?

6. A 3000-kg truck moving rightward with a speed of 5 km/hr collides head-on with a 1000-kg car moving leftward with a speed of 10 km/hr. The two vehicles stick together and move with the same velocity after the collision. Determine the post-collision speed of the car and truck.

7. Block A with mass 12 kg moving 2
Block A with mass 12 kg moving 2.4 m/s makes an elastic head-on collision with block B, mass 36 kg, which is at rest. The velocity of Block A after the collision is -1.2m/s. Find the velocity of the Block B after the collision.