Question

A ball is thrown vertically upwards with a veocity of 20ms-1 from the top of a multistorey building.

The height of the point from where the ball is thrown in 25.0m from the ground (a) How high

will the ball rise? (b) How long will it be before the ball hits the ground.​

Answer 1

Answer:

20m

Explanation:

v=0 at higest point

u=20m/s

a=-10m/s^2

using

v^2-u^2=2as

0-400=2×-10×s

s=20m

sorry i couldn't get your second part plz make it clear