A mass attached to one end of a string crosses topmost point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ( g = gravitational acceleration)

Question

A mass attached to one end of a string crosses topmost point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ( g = gravitational acceleration), g, 3 g, 4 g, 6 g

MARKS App · Accepted Answer

Critical velocity at top most point v = r g ∴ Velocity when string become horizontal v ' = υ 2 + 2 g r = 3 g r Centripetal acceleration = υ 2 r = 3 r g r = 3 g

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