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NEET-XI-Physics

07: System of particles and Rotational Motion

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  • #18
    A solid sphere rolls down two different inclined planes of the same heights but different angles of inclination, (a) Will it reach the bottom with the same speed in each case? (b) Will it take longer to roll down one plane than the other? (c) If so, which one and why?
    Ans : (a) Using law of conservation of energy,


    (b) Using law of conservation of energy,


    (c) Clearly, the solid sphere will take longer to roll down the plane with smaller inclination.
  • #18-a
    Will it reach the bottom with the same speed in each case?
    Ans : Using law of conservation of energy,


  • #18-b
    Will it take longer to roll down one plane than the other?
    Ans : Using law of conservation of energy,


  • #18-c
    If so, which one and why?
    Ans : Clearly, the solid sphere will take longer to roll down the plane with smaller inclination.