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enter image description hereIn this type of horizontal circular motion (when the string is also horizontal), Which force balances the vertical force of gravity (Mg) ?

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    $\begingroup$ Comment to the post (v2): Is the green particle supported by a horizontal surface? $\endgroup$ – Qmechanic Aug 29 '16 at 14:19
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It is impossible for a conical pendulum to be horizontal as there is no force countering gravity. Hence the semi-vertical angle willtend to 90 if the string is spun fast enough but the vertical component of the tension will be balancing the the weight of the object

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    $\begingroup$ Hi user353587; we prefer that you don't post the same answer to multiple questions. Flag one of them as a duplicate of the other instead. $\endgroup$ – David Z Aug 29 '16 at 15:15

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