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What is the minimum velocity with which...

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop ?

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`mv^(2)//r = mg, v = sqrt(rg) = sqrt(1.25 xx 9.8) = 3.5 m//s`
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ICSE-CIRCULAR MOTION -MODULE 1 (FROM CENTRIPETAL FORCE)
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