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General
Easy

Question

A block of mass 'M' area of cross–section 'A' & length blank to the power of ´ end exponent lambda to the power of ´ end exponent 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

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