Physics-
General
Easy

Question

Three weight A, B and C are connected by string as shown in the figure. The system moves over a frictionless pulley. The tension in the string connecting A and B is (where g is acceleration due to gravity)

  1. g    
  2. fraction numerator g over denominator 9 end fraction    
  3. fraction numerator 8 g over denominator 9 end fraction    
  4. fraction numerator 10 g over denominator 9 end fraction    

The correct answer is: fraction numerator 10 g over denominator 9 end fraction


    T equals fraction numerator 2 cross times m subscript B end subscript m subscript C end subscript over denominator m subscript A end subscript plus m subscript B end subscript plus m subscript C end subscript end fraction cross times g equals fraction numerator 2 cross times 1 cross times 5 over denominator 3 plus 1 plus 5 end fraction cross times g equals fraction numerator 10 over denominator 9 end fraction g

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