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There are four types of friction; fluid, sliding, static, and rolling friction.
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| Does anything reduce frition? | |
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| Lubricants reduce friction. A lubricant is a substance introduced to reduce friction between surfaces in mutual contact. | |
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Bob is now an expert in friction
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| Thanks Albert, now I know all about frition. | |
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| Bob, there is still a lot more to learn in the future. | |
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