Question

a boy throws a rubber ball vertically upwards what type of work is done by the gravitational force on it​

Answer 1

When a boy throws a rubber ball vertically upwards, (a) a positive work is done by the force applied by the boy, as the ball moves in the direction of force and (b) a negative work is done by the gravitational force of earth, as the ball moves in a direction opposite to that of the gravitational force.