Battery Drill

IB Physics: Battery Drill

I got this idea when I was walking around the local hardware shop and saw a special offer on electric drills so I bought 6. These drills were the 220V type with a variable speed setting which I guess was a way of applying a variable voltage to the drill motor. The sort of experiments I had envisaged were of where students wrapped string around the drill bit and lifted different loads and as expected these were the sort...


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