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BITSAT Physics Rotational Motion 2023 BITSAT 2023 (Memory Based Paper 1)

BITSAT Physics Question (2023) — Solution

Question

A disc is rolling without slipping on a surface. The radius of the disc is R. At t=0, the top most point on the disc is A as shown in figure. When the disc completes half of its rotation, the displacement of point A from its initial position is

Options

  1. A. R ( ^2+4 )
  2. B. R ( ^2+1 )
  3. C. 2 R
  4. D. 2 R (1+4 ^2 )

Answer

A. R ( ^2+4 )

Step-by-step solution

(a) From figure, Displacement, BA = (2 R )^2+( R )^2 = R 4+ ^2

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