GENERAL KNOWLEDGE

Detailed explanation-1: -When the viscous force and the gravitational pull becomes equal the body falls down with a constant velocity. This constant velocity attained by a body as it falls down through a fluid medium is called the terminal velocity.

Detailed explanation-2: -The terminal velocity formula is Vt=√2mgACd V t = 2 m g A C d .

Detailed explanation-3: -Critical velocity and terminal velocity are not the same. Critical of a liquid is the limiting velocity for streamline flow of the liquid, but terminal velocity is the constant velocity acquired by a body moving through a fluid.

Detailed explanation-4: -When a small object moves in a viscous medium it experiences a resistive force that is opposite in direction to its velocity and directly proportional to its speed. For this problem, assume that the object only moves up and down and take the upward direction to be positive.