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NEET2018PhysicsCenter of Mass, Momentum and CollisionActual

What will be the position of centre of mass of a half disc of uniform mass density as shown

Options

  1. A2 a
  2. B4 a 3
  3. Ca
  4. D2 a 3

Correct answer

B. 4 a 3

Step-by-step solution

Fact that C.O.M. of half disc is at distance of 4 a 3 from centre.

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