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NEET2020PhysicsCenter of Mass, Momentum and CollisionActual

Two particles of mass 5   kg and 10   kg respectively are attached to the two ends of a rigid rod of length 1   m with negligible mass. The centre of mass of the system from the 5   kg particle is nearly at a distance of:

Options

  1. A50   cm
  2. B67   cm
  3. C80   cm
  4. D33   cm

Correct answer

B. 67   cm

Step-by-step solution

mr = constant ⇒ r ∝ 1 m r 1 r 2 = m 2 m 1 = 10 5 = 2 1 r 1 = 2 3 r = 2 3 × 100   m = 67   cm

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