The combined mass of the people in the elevator is 55.1kg
Explanation:
Given-
Work done by the elevator, W = 8100J
Height, h = 15m
Combined mass of the people, m = ?
We know,
acceleration due to gravity, g = 9.8m/s²
Work done = potential energy of the elevator
W = mgh
8100J = m X 9.8 X 15
[tex]m = \frac{8100}{15 X 9.8} \\\\m = \frac{8100}{147} \\\\m = 55.1kg[/tex]
Therefore, combined mass of the people in the elevator is 55.1kg
