Question

A ball is dropped freely from the bridge into a river. If it takes 6 seconds to reach water surface in river. Calculate the height of bridge from water surface. Also calculate the velocity with which the ball strikes the surface of the water. Take g=9.8ms square

Answer 1

Explanation:

u=0

t=6

from motion second equation

s=ut+1/2gtt

s=0*6+1/2*9.8*6*6

s=1/2*9.8*36

s=9.8*18

s=176.4m