JEE Main & Advanced Physics Rotational Motion Question Bank Self Evaluation Test - System of Particles Rotational Motion

  • question_answer
    Two spheres A and B of masses m and 2m and radii 2R and R respectively are placed in contact as shown. The COM of the system lies                        

    A) insider                

    B)   insider            

    C) at the point of contact   

    D) None of these         

    Correct Answer: C

    Solution :

    [c] Let O (0,0) be the centre of sphere A then, \[{{x}_{cm}}=\frac{m\times 0+2m\times 3R}{m+2m}=2R\] =At the point of contact


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