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Question

A stone is released from the top of a tower of height 19.6m. Calculate its final velocity just before touching the ground.

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Solution

Given : Height of the tower H=19.6 m
Initial velocity of the stone u=0
Acceleration a=g=9.8 ms2
Let the final velocity of the stone be v
Using, v2u2=2aH
v20=2(9.8)×19.6 v=19.6 ms1

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