Problem 6.3

6.3. a)

The work done by the force of gravity is given by

$W = mgh ~=~ (3.35 \times 10^{-5})(9.8)(100) J$

$W = 3.28 \times 10^{-2} J$

b)

The force of gravity equals the force of air resistance since the raindrop is falling at constant speed, so the work done by air resistance is given by

$W = - 3.28 \times 10^{-2} J$