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Easy

Question

Uniform cylinder rolls from rest down the side of a through whose vertical dimension y is given by the equation y = kx2. The cylinder does not slip from A to B but the surface of trough is frictionless from B to C. Then height of ascent of cylinder towards C is –

  1. fraction numerator y subscript 1 end subscript over denominator 3 end fraction  
  2. fraction numerator 2 y subscript 1 end subscript over denominator 3 end fraction  
  3. fraction numerator 3 y subscript 1 end subscript over denominator 2 end fraction  
  4. y1  

The correct answer is: fraction numerator 2 y subscript 1 end subscript over denominator 3 end fraction

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