Vitorr classes

Raindrops of radius 1 mm and mass 4 mg are falling with a speed 30 m/s on the head of a bald person. The drops splash on the head of  the person 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

wo blocks of mass  ma and mb respectively are kept in contact on a frictionless table. The experimenter pushes the block a from behind so that the blocks accelerate . If the block A exerts a force F on the block B, what is the force exerted by the experimenter on block A ?

A particle of mass 50 g moves on a straight line. The variation of  speed with time is shown in figure. Find the force acting on the  particle at t =2, 4 and 6 seconds

Two blocks of equal mass m are tied to each other through a light string. One of the blocks is pulled along the line joining them with a constant force F. Find the tension in the string joining the two blocks.