A 4.62 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.7 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for g

Answer 1

m g h = change in potential energy = work done by gravity

= 4.62 * 10^-5 * 9.8 * 83.7 Joules

then multiply by 10^3 to get milli Joules