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A small body of mass m is tried to a str...

A small body of mass m is tried to a string and revolved in a vertical circle of radius r. If the tension in the string at the highest point is mg, what is its speed there?

Text Solution

Verified by Experts

If `v_1` is the speed and `T_1` the tension in the string at the highest point, `T_1=mg=(mv_1^2)/(r)-mg`
`therefore v_1^2=2rg " " therefore v_1=sqrt(2rg)`
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