Question

A ball is dropped from the roof of a building it takes 10 second to reach the ground find the height of the building gravity is 9.8 M per second square ​

Answer 1

Let s=distance or height in metres

u=initial velocity in metres per seconds

g=acceleration due to gravity in metres per seconds per second

t=time in seconds

s = ut + 0.5gt^2

= 0(10) + 0.5(9.8)(10)^2

= 0 + 4.9(100)

490m

Answer 2

hope it will help you.