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A stone is released from the top of a tower of height 19.6m. Calculate its final velocity just before touching the ground.
According to question, u = 0, h = 19.6 m, g = 9.8 m/s2
from the equation, v2 - u2 =2gh
v2 - 0 =2x9.8x19.6
v2 =19.6 ms-1
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