Categories > Motion in A Plane > Non-uniform-circular-motion > A block of mass \[m\] at the end of a string is whirled round in a vertical circle of radius \[R\]. The critical speed of the block at the top of its swing below which the string would slacken before the block reaches the top is

Motion in A Plane

Question: A block of mass \[m\] at the end of a string is whirled round in a vertical circle of radius \[R\]. The critical speed of the block at the top of its swing below which the string would slacken before the block reaches the top is


1) \[Rg\]
2) \[{(Rg)^2}\]
3) \[R/g\]
4) \[\sqrt {Rg} \]
Solution: Explanation: Explanation
Non-uniform-circular-motion

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