Ncert numerical solution of friction
These are the question 's solution of ncert on friction
question 5.1
Given the magnitude and direction of the net force acting on
(a) a cork of mass 10g floating on water
(b) a kite skillfully held stationary in the sky
(c) a drop of rain falling down with a constant speed
(d) a car moving with a constant velocity of 30 km/h on a rough road
(e) a high-speed electron in space far from all material objects, and free of electric and magnetic fields .
Answer
(a) here the cork having mass 10 g is floating on water so its weight is balanced by bouyant force . hence the net force acting on the cork is zero .
(b) since the kite is held stationery hence the net force acting on it is o
(c) As the rain falling downward with constant speed , hence according to newton first law of motion net force acting on drop is zero .
(d) since the car is moving with constant velocity so the net force acting on it is 0
(e) As the electron is far away from electric and magnetic fields as all material so the net force acting on it is 0
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