- 62

- 0

**1. Homework Statement**

A cart (m1 = 130 kg) is moving to the right along a track at v1i = 24 m/s when it hits a stationary cart (m2 = 350 kg) and rebounds with a speed of v1f = 4 m/s in the opposite direction.

a) With what speed does the 350 kg cart move after the collision?

A: 10.4 m/s

An observer moves in the same direction as the incoming cart with a speed of 12 m/s.

Using the convention that the positive direction is to the right, what are the following velocities with respect to this observer:

b) v1i, ob... A: 12

c) v2i, ob... A: -12

d) v1f, ob... A: 16

e) v2f, ob... A: -1.6

__This is the annoying part...__*f) What is the total momentum of the system before the collision as seen by this moving observer?*

*g) What is the total momentum of the system after the collision as seen by this same observer?*

**2. Homework Equations**

m1v1 = m2v2

Any thoughts on how to solve this? I'm a little lost.