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Applying NLM along 3 Axis

A sphere of m...

Question

A sphere of mass $100 g$ is rotated at uniform angular velocity of $2 r a d s^{- 1}$ 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 $0.5 N$
$T = m ω^{2} R$
or, $T = 100 \times 10^{- 3} \times (2)^{2} \times 1.25 N$ $= 0.5 N$

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