Physics-
General
Easy

Question

Two blocks A and B of equal masses m kg each are connected by a light thread, which passes over a massless pulley as shown in the figure. Both the blocks lie on wedge of mass m kg. Assume friction to be absent everywhere and both the blocks to be always in contact with the wedge. The wedge lying over smooth horizontal surface is pulled towards right with constant acceleration a (m divided by s to the power of 2 end exponent ). (g is acceleration due to gravity) Normal reaction (in N) acting on block B is

  1. fraction numerator m over denominator 5 end fraction (3g + 4a)    
  2. fraction numerator m over denominator 5 end fraction (3g – 4a)    
  3. fraction numerator m over denominator 5 end fraction (4g + 3a)    
  4. fraction numerator m over denominator 5 end fraction (4g – 3a)    

The correct answer is: fraction numerator m over denominator 5 end fraction (3g + 4a)

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