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I used to use a big round of wood that I'd get each year when I cut my firewood. I would let the student take a big swing with the sledge hammer. Did this successfully for years. I never imagined that he could miss the round (about 1.5 ft. diameter). The sledge glance off the wood. I didn't get hurt that time, just scared. Now I just talk about it and show the video. There are too many good inertia demos to die for one that's a bit dicey.
Area? Please explain?
bc
On 2010, Sep 28, , at 05:29, David Geller wrote:
I borrow a 20 kg plate from our weight room. The only difference is that the large area adds to the inertia effect.