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JEE Main 202116 MarchMorning Shift
Exam
JEE Main
Year
2021
Date
16 March
Shift
Morning Shift
Subject
Physics
Chapter
Motion in Two Dimensions

JEE Main 2021 · 16 March · Morning Shift · Physics · Motion in Two Dimensions

A block of 200g mass moves with a uniform speed in a horizontal...

A block of 200g200g mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius 20cm20cm. If the block takes 40s40s to complete one round, the normal force by the side walls of the groove is:

Options

  1. A0.0314N0 . 0314N
  2. B9.859×10−2N9 . 859 \times {10}^{- 2}N
  3. C6.28×10−3N6 . 28 \times {10}^{- 3}N
  4. D9.859×10−4N9 . 859 \times {10}^{- 4}N

Correct answer

D. 9.859×10−4N9 . 859 \times {10}^{- 4}N

Step-by-step solution

N = m{\omega}^{2}R</p><p>Given</p><p>Givenm = 0 . 2kg, T = 40S, R = 0 . 2m</p><p>Putvaluesinequation(1)</p><p>Put values in equation \left(1\right)

N=9.859×10−4NN = 9 . 859 \times {10}^{- 4}N

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