A ball of mass `50g` from rest vertically downwards through a distance of `40m`, and hits the ground. Find the kinetic energy before it hits the ground.

A ball is thrown upwards with a speed u from a height h above the ground.The time taken by the ball to hit the ground is

A person standing near the edge of the top of a building throws two balls A and B. The ball A is thrown vertically upward and B is thrown vertically downward with the same speed. The ball A hits the ground with speed v_A and the ball B hits the ground wiht a speed v_B . We have

A body of mass 10 kg is kept at a height of 5 m. It is allowed to fall and reach the ground. What is the kinetic energy possessed by the body just before hitting the ground? (Take g = 10m//s^(2) ).

A bullet fired at an angle of 60^(@) with the vertical hits the levelled ground at a distance of 200 m . Find the distance at which the bullet will hit the ground when fired at angle of 30^(@) . (with same speed).

A rubber ball of mass 50 g falls from a height of 5m and rebounds to a height of 1.25 m. Find the impulse and the average force between the ball and the ground if the time for which they are in contact was 0.1s

A ball is thrown vertically upwards. It goes to a height 19.6 m and then comes back to the ground, Find the final velocity of the ball when it strikes the ground. Take g = 9.8 m s^(-2)

Find the gravitational potential energy of 1 kg mass kept at a height of 5 m above the ground Calculate its kinetic energy when it falls and hits the ground. Take 10 m s^(-2)

Two balls are thrown simultaneously, A vertically upwards with a speed of 20 m/s from the ground, and B vertically downwards from a height of 40 m with the same speed along the same line of motion. At what point do the two balls collide? Take g = 9.8 m//s^(2) .

A ball of mass 10 g falls from a height of y 5 m. It rebounds from the ground to a height of 4m. Find : (a) the initial potential energy of the ball, (b) the kinetic energy of the ball just before the ground. striking the ground, (c) the kinetic energy of the ball after striking the ground ,and (d) the loss in kinetic energy on striking the ground . Take g=9.8 m s^(-2) .

A a certain instant of time a ballon is moving downwards with speed of 5m/s. It has a constant retardation of 5m/s2. A man in the ballon drops a stone at that instant. It hits the ground after 2s. Then the speed with which the stone hits the ground is.