a tool weighing 500 gram slipped from the hand of a worker while working on tower of 100 metre high calculate the velocity of the tool just before striking the ground
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formulae: v^2-u^2=2as
a=9.8
u=0
s=100
v^2=2as+u^2
=> 2×100×9.8-0
= 1960m/s
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