100 J of work was done to lift a 10-N rock and set it at Position A near the edge of a cliff. 1. If the 100 Joules of work lifted the rock to the top of the cliff, how much potential energy did the rock gain?

2. At point C, the rock’s potential energy will be _.

3. The rock’s kinetic energy at point A is _.

4. At point B, some of the rock’s potential energy will be changed to _ energy.

5. What is the mass of the rock?

6. What is the rock’s velocity just before it hits the ground?