A body is suspended from a smooth horizontal nail by a string of length 0.25 metre. What minimum horizontal velocity should be given to it in the lowest position so that it may move in a complete vert

Question

A body is suspended from a smooth horizontal nail by a string of length 0.25 metre. What minimum horizontal velocity should be given to it in the lowest position so that it may move in a complete vertical circle with the nail at the centre ?

Accepted Answer

Answer: ms⁻¹ — When a string fixed with a nail, moves along a vertical circle, the minimum horizontal velocity at the lowest point of circle is given by v = √5rg = √(5 × 0.25 × 9.8) = √12.25 m/s

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