Physics-
General
Easy

Question

A uniform rod of length L and density rho is being pulled along a smooth floor with a horizontal acceleration alpha (sec figure). The magnitude of stress ( fraction numerator f o r c e over denominator a r e a end fraction ) at the transverse cross-section through the midpoint of the rod is

  1. rho alpha L    
  2. fraction numerator 3 over denominator 4 end fraction rho alpha L    
  3. fraction numerator 2 over denominator 3 end fraction rho alpha L    
  4. fraction numerator 1 over denominator 2 end fraction rho alpha L    

The correct answer is: fraction numerator 1 over denominator 2 end fraction rho alpha L

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