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Why doesn't a ball roll forever after being kicked at a soccer game!
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Why doesn't a ball roll forever after being kicked at a soccer game!

User Hikari Iwasaki
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2 Answers

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Friction, lack/loss of kinetic energy
User Mmierins
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Every time the ball has to push an air molecule or a blade of grass out of the way, it has to use some of its kinetic energy to do that. Eventually it uses up all the KE it has, whereupon it runs out of gas and stops moving.
User Bauerpauer
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