Question

Give the magnitude and direction of the net force acting ona. a drop of rain falling down with a constant speedb. a cork of mass 10 gram floating on waterc. a kite skillfully held stationary in the skyd. a car moving with a constant velocity of 30 km/h on a rough roade. a high speed electron in space far from all material objects and free of electric and magnetic fields

Answer 1

Hii dear,

● Answer- F = 0 in all conditions

◆ Explainations-
(a) Speed of the raindrop is constant, hence acceleration will be zero.
F = ma = m×0 = 0

(b) Here, weight of the floating cork is balanced by the upthrust due to water.
Therefore, F = 0.

(c) As the kite is held stationery, according the first law of motion,
F = 0

(d) As velocity of the car is constant, its accleleration will be zero.
F = ma = m×0 = 0.

(e) As the electron is far away from all gravitational and magnetic fields, there are no forces aching on it.
Hence, F = 0

Thanks for asking...