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  4. A body of mass m is suspended from a string of length l. What is the minimum horizontal velocity that should be given to the body at its lowest position so that it may complete one full revolution in the vertical plane with the point of suspension as the centre of the circle?

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Q. A body of mass m is suspended from a string of length $ l. $ What is the minimum horizontal velocity that should be given to the body at its lowest position so that it may complete one full revolution in the vertical plane with the point of suspension as the centre of the circle?

Bihar CECEBihar CECE 2012Work, Energy and Power

Solution:

For looping the loop minimum velocity at the lowest point should be $\sqrt{5 g l}$.