Question

A ball of mass 100 g is dropped from a height of 20 m. Find the work done by the gravitational force.

Answer 1

Answer:

$pe = mgh \\ = \frac{100}{1000} \: kg \times 10 \: m \: {sec}^{ - 2 } \times 20 \: m \\ \\ = 20 \: newton$