One end of string of length l is connected to a particle of mass m and the other end is connected to a small…

One end of string of length l is connected to a particle of mass m and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed v, the net force on the particle (directed towards center) will be (T represents the tension in the string)
  1. T
  2. T+mv2l
  3. T-mv2l
  4. Zero

Solution

Centripetal force mv2l is provided by tension so the net force will be equal to tension i.e., T.

Asked in: NEET 2017

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