Question

a 4.00kg object traveling westward at 25.0m/s hits a 15.0kg object at rest. the 4.00kg object bounces eastward at 8.00m/s. what is the speed and direction of the 15.0kg object?

Answer 1

Let westward velocity be positive and eastward velocity be negative.
Use conservation of momentum.

4*25 = 4*(-8) + 15 V

Solve for V

V = 132/15 m/s

Answer 2

8.8