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[" A particle tied to a string describes...

[" A particle tied to a string describes a vertical circular motion "],[" of radius "r" continually.If it has a velocity "sqrt(3gr)" at the "],[" highest point,then the ratio of the respective tensions in "],[" the string holding it at the highest and lowest points is "],[[" (a) "4:3," (b) "5:4," (c) "1:4," (d) "3:2]]

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