To get to his apartment a man has to climb five flights of stairs.
The height of each flight is 3.7 m and the man has a mass of 74 kg.
What is the approximate gain in the man's gravitational potential energy during the climb?
A. 13 000 J B. 2700 J C. 1500 J D. 12 500 J
Answer: A
Step 1: List the known quantities
- Height of each flight of stairs = 3.7 m
- Mass, m = 74 kg
- Gravitational field strength, g = 9.81 N kg-1
Step 2: State the gravitational potential energy equation and rearrange for height
Step 3: Find the change in height
Step 4: Substitute in the known values to calculate