A particle of mass m is suspended from a ceiling through a string of length L . The particle moves in a…

A particle of mass m is suspended from a ceiling through a string of length L. The particle moves in a horizontal circle of radius r such that r=L2. The speed of particle will be :
  1. rg
  2. 2rg
  3. rg2
  4. 2rg

Solution

sinθ=12

θ=45°

tanθ=mv2rmg=v2rg=1

v2=rg

v=rg

Asked in: JEE Main 2021 (26 Aug Shift 2)

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