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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 lies 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/s2). 
(g is acceleration due to gravity)
Select one or more:
  • a)
    Normal reaction on B is 
  • b)
    Normal reaction on B is 
  • c)
    Normal reaction on A is 
  • d)
    Normal reaction on A is 
Correct answer is option 'B,C'. Can you explain this answer?
Verified Answer
Two blocksAandBof equal massesmkgeach are connected by a light thread,...

The FBD of A and B are
Applying Newton's second law to block A and B along normal to inclined surface

Solving  
For NA to be non zero

or 

The correct answers are: Normal reaction on A is  Normal reaction on B is 
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Two blocksAandBof equal massesmkgeach are connected by a light thread, which passes over a massless pulley as shown in the figure. Both the blocks lies on wedge of massmkg. 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 accelerationa(m/s2).(gis acceleration due to gravity)Select one or more:a)Normal reaction onBisb)Normal reaction onBisc)Normal reaction onAisd)Normal reaction onAisCorrect answer is option 'B,C'. Can you explain this answer?
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