Physics-
General
Easy

Question

The figure shows a uniform rod lying along the x-axis. The locus of all the points lying on the xy-plane, about which the moment of inertia of the rod is same as that about O is

  1. an ellipse    
  2. a circle    
  3. a parabola    
  4. a straight line    

The correct answer is: a circle

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Velocity of the ball A just after the collision is 3j) m/s

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