Answer:
Step-by-step explanation:
work done by gravitational force during fall of distance d = mgd
work done by drag = w ( let )
mgd - w = 1/2 m v²
w = m g d - 1/2 m v²
so work done by drag force
= m g d - 1/2 m v²
b ) when terminal velocity is reached , drag force = mg
power supplied by drag force = force x velocity
= mg x v
P_d = mgv