Q. 83.9( 9 Votes )

Raindrops of radius 1 mm and mass 4 mg are falling with a speed of 30 m/s on the head of a bald person. The drops splash on the head and come to rest. Assuming equivalently that the drops cover a distance equal to their radii on the head, estimate the force exerted by each drop on the head.

Answer :


Given: initial velocity


Final velocity


Mass of the droplet=


Radius of the droplet =


Distance covered by the drop on the head,


Using the equation of motion



Thus, acceleration


Thus, the force


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