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A bob of mass ‘m’ is suspended by a light string of length ‘L’. It is imparted a minimum horizontal velocity at the lowest point A such that it just completes half circle reaching the top most position B. The ratio of kinetic energies B A ) E . K ( ) E . K ( is V m C V H mg V L A mg L O B

1. 3 : 2
2. 2 : 5
3. 5 : 1
4. 1 : 5

Correct answer: 5 : 1

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