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Question

A sphere of mass 100 g is rotated at uniform angular velocity of 2 rads1 along a circle of radius 1.25 m in horizontal plane with help of a light horizontal string. The tension in the string is:

A
0.25 N
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B
0.5 N
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C
2.5 N
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D
5 N
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Solution

The correct option is B 0.5 N
T=mω2R
or, T=100×103×(2)2×1.25 N=0.5N

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