[" A ball is thrown vertically upwards from "],[" the ground.Work done by air resistance "],[" during its time of flight is "]

A ball is thrown vertically upwards from the ground. If T_1 and T_2 are the respective time taken in going up and coming down, and the air resistance is not ignored, then

A ball is thrown vertically upwards from the ground. If T_1 and T_2 are the respective time taken in going up and coming down, and the air resistance is not ignored, then

A ball is thrown vertically upwards. Assuming the air resistance to be constant and considerable,

A ball is thrown vertically upwards from the ground. It crosses a point at the height of 25 m twice at an interval of 4 secs. The ball was thrown with the velocity of