Question: A 1.70-m tall person lifts a 2.50-kg book from the ground so it is 2.40 m above the ground.
Part A: What is the potential energy of the book relative to the ground? Express your answer to three significant figures and include the appropriate units.
Part B: What is the potential energy of the book relative to the top of the person's head? Express your answer to three significant figures and include the appropriate units.
Part C: How is the work done by the person related to the answers in parts A and B?
1. The work done by the person in lifting the book from the ground to the final height is the same as the answer to part A
2. The work done by the person in lifting the book from the ground to the final height is the same as the answer to part B