Physics-
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A plate of mass M is placed on a horizontal frictionless surface and a body of mass m is placed on this plate, The coefficient of dynamic friction between this body and the plate is mu. If a force 2 mu m g. is applied to the body of mass in along the horizonal direction the acceleration of the plate will be ……

  1. fraction numerator m over denominator M end fraction g    
  2. fraction numerator m over denominator left parenthesis M plus m right parenthesis to the power of g end exponent end fraction    
  3. fraction numerator 2 mu m over denominator M end fraction g    
  4. fraction numerator 2 mu m over denominator left parenthesis M plus m right parenthesis to the power of g end exponent end fraction    

The correct answer is: fraction numerator m over denominator M end fraction g

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