Assume that the working ideal gas is one mole of the molecule h2, at a temperature such that the translational and rotational degrees of freedom are active. v1 = 1 m3, v2 = 0.25 m3, v3 = 0.5 m3, and p1=1 atm. what is the magnitude of the work done for the adiabatic process 1-2 (represented by the line connecting points 1 and 2)?

Answertechnician (a) is correct;

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.