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Question Number 24879 by Tinkutara last updated on 28/Nov/17

$$\mathrm{A}\mathrm{particle}\mathrm{of}\mathrm{mass}m\mathrm{is}\mathrm{fixed}\mathrm{to}\mathrm{one}\mathrm{end}$$$$\mathrm{of}\mathrm{a}\mathrm{light}\mathrm{rigid}\mathrm{rod}\mathrm{of}\mathrm{length}l\mathrm{and}\mathrm{rotated}$$$$\mathrm{in}\mathrm{a}\mathrm{vertical}\mathrm{circular}\mathrm{path}\mathrm{about}\mathrm{its}$$$$\mathrm{other}\mathrm{end}.\mathrm{The}\mathrm{minimum}\mathrm{speed}\mathrm{of}\mathrm{the}$$$$\mathrm{particle}\mathrm{at}\mathrm{its}\mathrm{highest}\mathrm{point}\mathrm{must}\mathrm{be}$$

Commented by ajfour last updated on 28/Nov/17

$$zero.$$

Commented by Tinkutara last updated on 28/Nov/17

$$\mathrm{Why}\mathrm{not}\sqrt{gl}?$$

Commented by prakash jain last updated on 28/Nov/17

$$\mathrm{Since}\mathrm{it}\mathrm{is}\mathrm{a}\mathrm{solid}\mathrm{rod}\mathrm{there}\mathrm{is}\mathrm{no}$$$$\mathrm{requirement}\mathrm{for}\mathrm{tension}\mathrm{at}\mathrm{the}$$$$\mathrm{highest}\mathrm{point}\mathrm{like}\mathrm{in}\mathrm{string}.$$$$$$

Commented by Tinkutara last updated on 28/Nov/17

$$\mathrm{Thank}\mathrm{you}\mathrm{Sir}!$$

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