Question

Give the magnitude and direction of the net force acting on

(a) A drop of rain falling down with constant speed.
(b) A kite skillfully held stationary in the sky.

CLASS - XI PHYSICS (Laws of Motion)

Answer 1

a) Since the drop of rain is falling at constant speed, the acceleration is 0. Net force is given by mass×acceleration. So the net force acting on it is 0.
b) Since the kite is stationary, acceleration is 0. So net force is 0.

Answer 2

Answer:

(a) The rain drop is falling with a constant speed. Hence, it acceleration is zero. As per Newton’s second law of motion, the net force acting on the rain drop is zero.

(b) The kite is stationary in the sky, i.e., it is not moving at all. Hence, as per Newton’s first law of motion, no net force is acting on the kite.