Question

How long will a stone take to fall to the ground
from the top of a building 80 m high and (b) what
will be the velocity of the stone on reaching the
ground ? (Take g = 10 m s-2)​

Answer 1

Answer:

YOUR ANS. IS IN ABOVE IMAGE

Explanation:

I HOPE IT MAY HELPS YOU

Please mark it as brainliest

Answer 2

Answer

a : 4 sec

b : 40 m/s

Explanation:

a : u=0 , h=80m , g=-10m/s^2

h = ut + 1/2 at^2

80 = 0 + 1/2 -10 * t^2

t^2 = 16

t = 4 sec

b : v = u + at

v = 0 + (-10) * 4

  = 40 m/s

Hope it helps