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Question

Three blocks of mass 2 kg,3 kg and 5 kg are tied with three identical strings. The blocks are free to rotate in a vertical circle. The minimum velocity given to the blocks to complete the vertical circle is v1, v2 and v3 respectively then

A
v1<v2<v3
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B
v1>v2>v3
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C
v1>v3>v2
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D
v1=v2=v3
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Solution

The correct option is D v1=v2=v3
The minimum velocity required by a block to perform the vertical circle is given by vmin5gR
Since vmin does not depend on the mass of the block.
Hence, option (d) v1=v2=v3 is correct.

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