Question

PLEASE HELP WILL GIVE 20 POINTS TO THE ANSWER!!! A 3000 kg car is moving east at 15 m/s with

another 2200 kg car moving west at 10 m/S
If the 2 cars collide and stick together, what speed and direction will they travel?

Answer 1

4.42 m/s EAST

Step-by-step explanation:

Conservation of Momentum Law: total momentum before the collision must equal the total momentum after the collision.

Momentum = P = mv

East is the positive direction.

(3000 kg)(15 m/s) - (2200 kg)(10 m/s) = (3000 kg + 2200 kg)v

45,000 kg·m/s - 22,000 kg·m/s = (5200 kg)v

23,000 kg·m/s = (5200 kg)v

v = (23,000 kg·m/s) / 5200 kg = 4.42 m/s EAST

The direction is east because the final velocity is (+)