A stone is thrown vertically upwards with an initial velocity of `10ms^(-1)` from the top of a cliff of height 40m.How much time it take to reach the ground?

A stone is thrown vertically upward with a speed of 10.0 ms^(-1) from the edge of a cliff 65 m high.How much later will it reach the bottom of the cliff ? What will be its speed just before hitting the bottom ?

A ball is thrown vertically upwards with a velocity of 20 ms^(-1) from the top of a multistorey building. The height of the point from where the ball is thrown is 25.0 m from the ground. (a) How high will the ball rise ? and (b) how long will it be before the ball hits the ground ? Take g = 10 ms^(-2) .