Question

a ball is thrown vertically upward from top of tower with speed of 100m/s .it strikes the pong near the base of the tower after 25s .the height of the tower is?

Answer 1

We are given

velocity=-100
negative because its opposite the direction of motion.

and t=25sec

By using the formula..

h=ut + 1/2 at^2

h=(-100)(25) +1/2(10)(25^2)
h=-2500+3125
h=625m