Question

A large electrified cage imprisons Presidential Time Squad member John Adams above a very deep pit near the surface of the Earth, suspended with a rope wrapped over a pulley. On the other end of the rope pulling down is his son, the sixth president John Quincy Adams.

A: If John Adams has a mass of 110kg while stuck in the cage, how much work does gravity do on the second president of the US as the cage is raised up 30m?

B: If the sixth president was pulling down the rope in part A to get the cage to raise, what was the force of tension in the rope and how much work did John Quincy Adams do on the rope?

C: After being raised the 30m, the sixth president throws the end of the rope to the second president who then begins pulling down on the rope to raise himself. What is the force of tension in the rope and how much work does the second president do on the rope while raising himself up another 20m?

Answer 1