Physics-
General
Easy

Question

A mass m rests on a horizontal surface. The coefficient of friction between the mass and the surface is μ .If the mass is pulled by a force F as shown in figure, the limiting friction between the mass and the surface will be.

  1. m mg    
  2. mu open parentheses m g minus open parentheses fraction numerator square root of 3 over denominator 2 end fraction close parentheses F close parentheses    
  3. mu left parenthesis m g minus left parenthesis F divided by 2 right parenthesis right parenthesis    
  4. mu left parenthesis m g plus left parenthesis F divided by 2 right parenthesis right parenthesis    

The correct answer is: mu left parenthesis m g minus left parenthesis F divided by 2 right parenthesis right parenthesis


    f = mN
    F sin invisible function application theta plus N equals m g
    fraction numerator F over denominator 2 end fraction plus N equals m g
    f equals mu open parentheses m g minus fraction numerator F over denominator 2 end fraction close parentheses
    N equals m g minus fraction numerator F over denominator 2 end fraction

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