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JEE Main2007PhysicsCenter of Mass, Momentum and CollisionActual

A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the circumferences of the discs coincide. The centre of mass of the new disc is / R from the centre of the bigger disc. The value of is

Options

  1. A1 / 3
  2. B1 / 2
  3. C1 / 6
  4. D1 / 4

Correct answer

A. 1 / 3

Step-by-step solution

In this question distance of centre of mass of new disc is R not R . aligned & - 3 M 4 R + M 4 R =0 & = 1 3 aligned

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