Physics-
General
Easy

Question

A block of mass m rests on a rough horizontal surface as shown in the figure. Coefficient of friction between the block and the surface is mu. A force F=mg acting at angle theta with the vertical side of the block pulls it. In which of the following cases can the block be pulled along the surface ?

  1. t a n invisible function application theta greater or equal than mu    
  2. c o t invisible function application theta greater or equal than mu    
  3. t a n invisible function application fraction numerator theta over denominator 2 end fraction greater or equal than mu    
  4. c o t invisible function application fraction numerator theta over denominator 2 end fraction greater or equal than mu    

The correct answer is: c o t invisible function application fraction numerator theta over denominator 2 end fraction greater or equal than mu

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