Re: science teacher needs help

Yes I saw this demo in A101 physics at college. It used a tin can for
the target and a small ball bearing shot out of a spring powered cannon
for the projectile. If you did the same it would trivialize the switch
problem.
I actually remember this experiment quite vividly and it was very
dramatic as the projectile and target were at opposite sides of the
lecture room. The distance was around 40' and the little cannon was
quite powerful.
Richard

.

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