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 floating on water(c) a kite skillfully held stationary in the sky (d) a car moving with a constant velocity of 30 km//hon a rough road (e) a high-speed electron in space far from all material objects and free of electric and magnetic fields.

Give the magnitude and direction of the net force acting on (a) a drop

1.	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 floating on water(c) a kite skillfully held stationary in the sky (d) a car moving with a constant velocity of 30 km//hon a rough road (e) a high-speed electron in space far from all material objects and free of electric and magnetic fields.
Answer» Solution :(a) As the rain drop is FALLING with a CONSTANT speed, its accelerationa=0. Hence net force F=ma =0. (b)As the CORK is floating on water , its weight is being balanced by the UPTHRUST (equal to weight of water displaced ). Hence net force on the cork is zero . (c)As the kite is held stationary , net force on the kiteis zero , in accordance with Newton.s first law. (d) Force is being applied to overcome the force of friction . But as velocty of the car is constant , its acceleration . a=0. Hence net force on the car F=ma=0. (e) As no field (graveitational //electric//magnetic ) is acting on the ELECTRON , net force on it is zero.