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NEET 2017
Exam
NEET
Year
2017
Subject
Physics
Chapter
Work, Power and Energy

NEET 2017 · Physics · Work, Power and Energy

One end of string of length l is connected to a particle of mass m...

One end of string of length ll is connected to a particle of mass mm and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed vv, the net force on the particle (directed towards center) will be (TT represents the tension in the string)

Options

  1. ATT
  2. BT+mv2lT + \dfrac{m{v}^{2}}{l}
  3. CT−mv2lT - \dfrac{m{v}^{2}}{l}
  4. DZero

Correct answer

A. TT

Step-by-step solution

Centripetal force (mv2l)\left(\dfrac{m{v}^{2}}{l}\right) is provided by tension so the net force will be equal to tension i.e., TT.
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