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Question

A plank P is placed on a hollow cylinder C, which rolls on a horizontal surface as shown. No slippage is there at any of the surface in contact. Both have equal mass say M each) and if v is the velocity of centre of mass of the cylinder C, then the ratio of the kinetic energy of plank P to the cylinder C is

  1. 1:1    
  2. 2:1    
  3. 3:8    
  4. 8:11    

The correct answer is: 2:1

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