[quote=@Prince of Seraphs]
Hey [@SirBeowulf]? While I'd say it wouldn't be unlikely for a student to try and knock the medal down rather than building up to it I'd think that the teacher would expect that some cocky student would try and put safeguards in place to prevent it. I'm not saying it would be completely impossible, far from it but I'd would assume that it would be more difficult than simply chucking a small cube at the crossbeam. Most crossbeams are made out of a very solid wood like oak and if I was the teacher in order to prevent people like Aurellius from doing exactly what he did I'd have the medal hung by chain and physically screwed into the crossbeam. Not something that would be easy to dislodge or break with just a simple weighted cube. [@Lugubrious] care to weight in?
[/quote]

The chain probably can't withstand the full force of a box colliding with it, is what I was going for. If he was lucky, and the box went in straight collided straight with the loop, it would be likely that the small chains couldn't fully handle the impact and just tore apart. That is, unless the teacher actually went and used a large size chain to hold it up there, which I wouldn't really imagine.