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JIPMER2015PhysicsCenter of Mass, Momentum and Collision

A body weighing 8 g when placed in one pan and 18 g when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, then the true weight of the body is

Options

  1. A13 g
  2. B9 g
  3. C22 g
  4. D12 g

Correct answer

D. 12 g

Step-by-step solution

Consider the diagram in balance 8 x=w y x y = w 8 ...(i) Also, w x=18 y x y = 18 w ...(ii) Dividing Eq. (i) and Eq. (ii) we get aligned x / y x / y & = w 8 18 / w w & = 18 8 =12 ~g aligned

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