Question

a stone is dropped from a building of height 30m.it accelerates at the rate of 10m/s. what will be the velocity of the stone when it hits the ground?how long will it take to reach the ground

Answer 1

Answer:

As a ball is dropped,it’s initial velocity u=o.

height, s=30.

a=10

final velocity, v=?.

time taken, t=?.

now,

as from the formula of final velocity, v=(2gh)^1/2

v=(2*10*30)^1/2

v=(600)^1/2

v=24.4 m/sec………This is the final velocity

we also know that v=u+at

24.4=0+(10)(t)

t=2.44 sec …. This the time taken

Explanation: