Upon setting up the "Monkey Hunter" demo in AP Physics 2 today, we discovered that the tree's electromagnet would no longer support the monkey. For some reason, the magnet lost its magnetism after about 10 yrs of once-per-year use. Bummer. So we hung a chain of paperclips ("worm") from the weak magnet and gave it a try. Mind you, the worm is about 1 cm wide. The monkey target is more than 10 times wider! The students demanded that we use the high speed camera to capture the result. You'll need to go full-screen to see anything.
QuickTime File - MP4 (Unannotated)
Credit to my AP Physics 2 students: they had more faith than I did that this would work. I made the mistake of hyping the demo in their schedule as "The Best Demo in Physics," and they weren't going to let a technical problem get in the way. Having dealt with cantankerous monkeys in the past, I didn't think we had a chance at hitting the skinny paperclip worm. They were right; I was wrong!