How high must a body be lifted to gain an amount of P.E. equal to the – InterviewSolution

InterviewSolution

1.	How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20ms^(-1). (The value of acceleration due to gravit at a place is 9.8ms^(-2))
Answer» SOLUTION :`mgh=1/2 MV^(2)` so `h=20.4m`

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