A ball is dropped from an elevator at an altitude of `200 m` (Fig.4. 39). How much time will the ball take to reach the ground if the elevatior is
.
a. Stationary?
b. Ascending with velocity `10 m s^(-1)`
c. Descending with velocity `10 m s^(-1)?

A stone is dropped from a balloon at an altitude of 300 m . How ling will the stone take to reach the ground of (a) the balloon is ascending with a velocity of 5 ,s^(-1). (b) the ballon is descending with a velocity of 5 ms^(-1) (c ) the balloon is shationary ?

A ball is dropped from the top of a tower.prove that,the height of the tower is 20m if the ball reaches the ground with a velocity 20 m//s .

A ball is dropped from a height of 5m. Find the velocity of the ball just before it reaches the ground. Do you require the value of mass to find the velocity?

A ball is projected horizontally with a velocity of 5 m/s from the top of a building 19.6 m high. How long will the ball take to hit the ground?

A particle is dropped from a tower 180 m high. How long does it take to reach the ground ? What is the velocity when it touches the ground ? Take g=10m//s^(2) .

A ball is thrown upwards from the top of a tower 40 m high with a velocity of 10 m/s. Find the time when it strikes the ground. Take g=10 m//s^2.