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AP EAMCET202017 Sep 2020Evening ShiftPhysicsMotion in Two DimensionsActual

One end of a string of length (l ) as 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 ) and (T ) is the tension in the string, then net force on the particle (directed towards the centre) is

Options

  1. A(T )
  2. B0
  3. C( T+m v^2 1 )
  4. D( T-m v^2 I )

Correct answer

A. (T )

Step-by-step solution

The given situation is shown in the following figure Here, (N=m g and T= m v^2 l ) Tension in the string provides necessary centripetal force. Hence, net force on the particle towards centre of circular path is equal to (T ).

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