5A ball is thrown horizontally from a height of 20 m. It hits the ground with a velocity three times its initial velocity. The initial velocity of ball is

A ball is thrown horizontally from a height of 20m .If hits the ground with a velocity of 3 times the velocity of projection.The velocity of projection is 3.5x m//s then x is

A ball is thrown vertically upwards from a height of 40 m and hits the ground with a speed that is three times its initial seepd. What is the time taken (in sec) for the fall ?

A ball is thrown vertically down from a height of 40m from the ground with an initial velocity .v.. The ball hits the ground, loses one-third of its total mechanical energy and rebounds back to the same height. If the acceleration due to gravity is 10ms^(-2) , the value of .v. is

A ball thrown in vertically upward direction attains maximum height of 16 m. At what height would its velocity be half of its initial velocity ?

A ball is thrown vertically down from height of 40 m from the ground with an initial velocity 'v'. The ball hits the ground, loses (1)/(3)rt of its total mechanical energy and rebounds back to the same height. If the acceleration due to gravity is 10 "ms"^(-2) , the value of 'v' is

A ball is thrown vertically down from height of 40 m from the ground with an initial velocity 'v'. The ball hits the ground, loses (1)/(3)rt of its total mechanical energy and rebounds back to the same height. If the acceleration due to gravity is 10 "ms"^(-2) , the value of 'v' is

A body is thrown horizontally from the top of a tower of 5 m height. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is

A ball thrown vertically upwards takes 4s to return to the ground. Find its initial velocity.