Question

2. To reduce friction, the parts of machines must be periodically and properly
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Answer 1

Answer:

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sooty

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Explanation:

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Answer 2

Answer:

•Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.

•Lubrication is another way to make a surface smoother. ...

•Make the object more streamlined. ...

•Reduce the forces acting on the surfaces. ...

•Reduce the contact between the surfaces.

Explanation:

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