bigmess559
24.01.2021 •
Mathematics
a stone is dropped in a river from a bridge . if it takes 4 seconds to reach of the surface of water, calculate the depth of the water level from the bridge. akso calculate the velocity with which the stone strijes the water surface.
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Ответ:
The stone takes 4sec to reach the water level.
initial velocity (u)=0
time(t)=4s
acceleration due to gravity(a)=
9.8(10 approx)
so,its final velocity will be
v=u+at
0+10×4=40
v=40m/s
Ответ:
Step by step explanation