Give the magnitude and direction of the net force acting on
(a) a drop of rain falling down with a constant speed,
(b) a cork of mass 10 g at rest
(c) a kite skillfully held stationary in the sky,
(d) a car moving with a constant velocity of 30 km/h on a rough road,

Asked by Topperlearning User | 4th Jun, 2014, 08:31: AM

Expert Answer:

(a)   Speed of drop is constant, and the direction of motion is constant



(b) Since the cork is at rest, straight v with rightwards arrow on top space equals space 0 and it does not change

(c) Since the kite is stationary straight v with rightwards arrow on top space equals space 0 and it does not change

(d) Since straight v with rightwards arrow on top= constant, straight a with rightwards arrow on top = 0 and hence, straight F with rightwards arrow on top = 0.

Answered by  | 4th Jun, 2014, 10:31: AM