When we have a force and we start pushing with the force this way, what happens to the kinetic energy or the temperature of the particles within this system? Well, when you move this way, pressure increases, volume decreases, and the particles get closer together. They start banging against each other more violently, more frequently. This, in turn, increases temperature, which in turn increases kinetic energy, but we saw that we want to have constant temperature. Okay, so what does this mean? While this increase in temperature means that there is an increase in pressure and there's an increase in the force, so not the force that we require or the net force that we require to move from this point to this point is greater than the force required to move from this point to this point.