Question

if a ball dropped from a height of 20m,How long will it take to reach the ground?,At what velocity will it touch the ground?(take g=10meter per second square​

Answer 1

20 m/s

Step-by-step explanation:

Take down to be positive.

Given:

s = 20 m

u = 0 m/s

a = 10 m/s²

Find: v

v² = u² + 2as

v² = (0)² + 2 (10) (20)

v = 20 m/s