Question

A rain drop of radius 0.3 mm0.3 mm has a terminal velocity in air=1 m/s.=1 m/s. The viscocity of air is 8105 poise.8105 poise. The viscous force on it is:

Answer 1

· It occurs when the sum of the drag force (Fd) and the buoyancy is equal to the downward force of gravity (FG) acting on the object. ... At this point the object ceases to accelerate and continues falling at a constant speed called the terminal velocity (also called settling velocity).