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NEET2022PhysicsCenter of Mass, Momentum and CollisionActual

Two objects of mass 10   kg and 20   kg respectively are connected to the two ends of a rigid rod of length 10   m with negligible mass. The distance of the center of mass of the system from the 10   kg mass is:

Options

  1. A20 3 m
  2. B10   m
  3. C5   m
  4. D10 3   m

Correct answer

A. 20 3 m

Step-by-step solution

Let's consider the location of 10   kg mass to be origin. Then location of COM will be, x com = m 1 x 1 + m 2 x 2 m 1 + m 2 = 10 × 0 + 20 × 10 10 + 20 ⇒ x com = 20 3   m

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