Give the magnitude and direction of the net force acting on
(a) a drop of rain falling down with a constant speed
(b) a crok of mass 10 g floating on water
(c) a kite skilfully held stationary in the sky
(d) a car moving with a constant velocity of `30 kh//h` on a rough road
(e) a high speed electron in space free from all gravitational objects and free of electric and magnetic fields.

Explanation

(a) to (d) No net force according to the First Law (e) No force, since it is far away from all material agencies producing electromagnetic and gravitational forces.