A 2100 kg truck is traveling east through an intersection at 2.0 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 5.0 m/s. The other is a 1500 kg midsize traveling east at 10 m/s. The three vehicles become entangled and slide as one body. What is their velocity (magnitude and direction) just after the collision?

speed is   meter per second and direction is   degrees

Explanation:

As per the conservation of momentum theory, Initial momentum is equal to final momentum

Substituting the given values we get

Velocity in horizontal direction

Velocity in vertical direction

Final velocity

Direction of the  velocity

So speed is   meter per second and direction is   degrees

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.