Object B is at rest when object A collides with it. The collision is one-dimensional and elastic. After the collision object B has half the velocity that object A had before the collision.
1) Which object has the greater mass?
2) By how much is the mass of object B greater than that of object A?
3) If the velocity of object A before the collision was 6.0 m/s to the right, what is its velocity after the collision?