A boy standing at the top of a tower of 20m of height drops a stone. A – InterviewSolution

InterviewSolution

1.	A boy standing at the top of a tower of 20m of height drops a stone. Assuming `g=10ms^(-2)`, the velocity with which it hits the ground is :-A. 10.0 m/sB. 20.0m/sC. 40.0m/sD. 5.0m/s
Answer» Correct Answer - B `v=\|(Deltavecv)/(Deltat)\|=sqrt(2xx10xx20)=20 m//s`

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