I'm currently taking Physics II and had a question. I'd ask my professor, but he's out of town until Monday and this is driving me crazy. Anyway, we recently started learning about magnetic fields. So far, I'm grasping most of it no problem. One thing that is throwing me off though is how they keep emphasizing that a magnetic force can't do work, it can only change direction. This seems counter-intuitive to me since if I let go of a magnet close to my refrigerator and it has zero initial velocity, it has a very rapid acceleration towards the refrigerator (until collision of course). If someone can help make sense of this to me, I'd appreciate it, because if that acceleration isn't coming from the magnetic force, then I'm not sure what it is that is causing it?