A 40 Kg Object Is Moving at 5

Multiple Choice

A 4.0 kg object is moving at 5.0 m/s NORTH. It strikes a 6.0 kg object at rest. The objects collide elastically and move away in the NORTH or SOUTH direction. The velocity of the 4.0 kg object after the collision is

A) 1.0 m/s NORTH.
B) 4.0 m/s NORTH.
C) 1.0 m/s SOUTH.
D) 4.0 m/s SOUTH.
E) 0 m/s.