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Question

One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle ( directed towards the centre ) is

A
T+mv2l
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B
Tmv2l
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C
Zero
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D
T
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Solution

The correct option is D T
Net force on the particle in uniform circular motion is centripetal force, which is provided by the tension in string.
so, Fc=T

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