A block of mass 2 kg travels along a horizontal frictionless surface
with velocity 3 m/s. The mass collides with another mass, m, and
rebounds with velocity 1 m/s. Mass m is initially at rest. What is the
kinetic energy of mass m after the collision?
- 10 J
- 6 J
- 2 J
- -4 J
- -8 J
- None of the above.
- Not enough information.