A stone is fastened to one end of a string and is whirled in a vertical circle of radius R. Find the minimum speed of the stone can have at the highest point of the circle.
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The Minimum speed of the stone that can have to the stone when it is rotated in a vertical circle is √rg.
Mathematical Proof ⇒
Refers the attachment for the question.
T + mg = mv²/r
We know that minimum speed will be at the place when its tension will be zero.
∴ v² = rg
⇒ v = √rg.
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