A stone is dropped from the roof the roof of a building .it takes 4 seconds to reach the ground.find the height of the buliding.[g=9.8m/s]
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T=U/G
4=U/9.8
4*9.8=U
39.2 ms^-1
H=U*U/2G
H=39.2*39.2/2*9.8
4=U/9.8
4*9.8=U
39.2 ms^-1
H=U*U/2G
H=39.2*39.2/2*9.8
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