Question

A raindrop of mass 3.26 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle.(a) As it falls 115 m, what is the work done on the raindrop by the gravitational force?

Answer 1

Answer:

Work done by the gravitational force is 37 mJ.

Explanation:

It is given that,

Mass of the raindrop, $m=3.26\times 10^{-5}\ kg$

It falls from a height of, h = 115 m

It falls vertically at constant speed under the influence of gravity and air resistance. We need to find the  work done on the raindrop by the gravitational force. It is given by :

$W=mgh$

$W=3.26\times 10^{-5}\ kg\times 9.8\ m/s^2\times 115\ m$

W = 0.0367 J

or

W = 0.037 J = 37 mJ

So, the work done on the raindrop by the gravitational force is 37 mJ. Hence, this is the required solution.