Question

An object fall from a certain height and reaches the ground after 5 second then find the height of the object?

Answer 1

Consider the height of tower to be H
Then initial speed of object is 0 i.e U=0
Time taken by the object to reach the ground is 8 seconds, t=8sec
Now apply simple kinematics
H=Ut + 1/2at^2
H=0×8 +1/2×9.8×8×8
H=0 + 313.6
H= 313.6m