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Originally Posted by Arkorobotics
Oh come on! You've got to be kidding! There is no way in this world that a foam ball did that damage.
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We actually spent a good deal of time talking about the physics of an accident in my trauma class this week and last. F=ma. You can apply as much force as you want if you can control either the mass or acceleration. When you negatively accelerate the ball by hitting the windshield, you transfer that energy to the windshield. The ball may not have all that mass, but you fire it fast enough and it will shatter that windshield.
Wetzel