A raindrop of mass 21.8 g is falling through the air, being acted on by both weight force and drag force, the latter following the law F_d = -bv^2
F?d??=-bv?2 where v is the speed and b = 0.355 kg/m. At the point in its motion when it is at terminal velocity, what is the power lost from the raindrop to the dissipative drag force (note: this power is simultaneous returned by the weight force to keep the drop moving at constant speed).