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JEE Main202116 Mar 2021Morning ShiftPhysicsMotion in Two DimensionsActual

A block of 200 g mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius 20 cm . If the block takes 40 s to complete one round, the normal force by the side walls of the groove is:

Options

  1. A0 . 0314   N
  2. B9 . 859 × 10 - 2   N
  3. C6 . 28 × 10 - 3   N
  4. D9 . 859 × 10 - 4   N

Correct answer

D. 9 . 859 × 10 - 4   N

Step-by-step solution

N = m ω 2 R Given m = 0 . 2   kg , T = 40   S , R = 0 . 2   m Put values in equation 1 N = 9 . 859 × 10 - 4   N

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