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A body of mass 4 kg is connected to the...

A body of mass 4 kg is connected to the two ends of a vertical rod of length 2 m by two threads of length 1.5 m each. The body is rotated about the rod as an axis. To produce a tension of 70 N on the upper string what should be the rpm of the body? What will be the tension in the lower string then?

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The correct Answer is:
35.1 rpm, 11.2 N
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