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Unread 25-03-2010, 14:15
AustinSchuh AustinSchuh is offline
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Re: Engineering Challenge- Spring Loaded Kicker Edition

Quote:
Originally Posted by JamesCH95 View Post
In short: make the kicker lighter, it will more efficiently transfer momentum to the soccer ball
Curious. Experimentally, we found that adding mass to one of our prototype kickers increased it's range from something like 5 feet to 15 feet. Then again, that prototype kicker was an extremely light and small piece of metal.

If you run some numbers with Va = 0 and Vb = 1, and the coefficient of restitution equal to 1 in the equation given at Wikipedia, you will find that equal masses of the two objects will result in perfect momentum transfer. I'm going to go out on a limb and guess that since our kickers are swinging around an axis, what you really want is equal moments of inertia around the axis for perfect energy transfer.