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8.A boy standing at the top of a tower of 20 m heightdrops a stone. Assuming g 10 m/s, the velocitywith which it hits the ground is AIPMT 2011)(1) 10.0 m/s(3) 40.0 m/s(2) 20.0 m/s(4) 5.0 m/s |
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Answer» h=20m g=10m/s^2 u=0 v^2-u^2 = 2gh v^2-0=2*10*20 v = 20 m/s^2 |
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