Answer / balachandran

As the bar is subjected to unequal loading at the ends ,bar will pull aside and acceleration will be towards the net force acting ( 2P - P = p),effect p is acting on one side due to that the bar is accelerating another p is resisting the acceleration,so stress is resisting force by area of cross section,answer is P/A

Answer / akash

P/A

Answer / hameedwahab

2P / A

Answer / vivek c

We always take the mean load like if load p acting on both
sides then stress=p/a
and here 1.5p/a

Answer / mayank jansari

stress= load/area
=p+2p/a=3p/a

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