Physics-
General
Easy

Question

A block of mass ‘M’ area of cross-section ‘A’ & length ‘l’ is placed on smooth horizontal floor. A force ‘ F ’ is applied on the block as shown. If ‘y’ is young modulus of material, then total extension in the block will be:

  1. fraction numerator F l over denominator A Y end fraction    
  2. fraction numerator F l over denominator 2 A Y end fraction    
  3. fraction numerator F l over denominator 3 A Y end fraction    
  4. cannot extend    

The correct answer is: fraction numerator F l over denominator 2 A Y end fraction


    Acceleration a = F/m


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