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Mini-Quiz: Lubricated Coefficient of Sliding Friction

by Ron Kurtus

Take this Mini-Quiz to check your understanding of the lesson material.

1. Why should environmental conditions be mentioned?

Because the environment is important to everyone

Grease gets thicker in colder temperatures, affecting the coefficient

Grease gets thicker in a humid climate, affecting the coefficient

2. Should the type and amount of grease be stated in listing coefficient?

No, because only surface roughness determines friction

No one is sure whether the type makes any difference

Yes, because lubrication varies greatly with material

3. When should you make your own friction measurements?

When the exact amount of friction needs to be known

When the normal force varies

You do not need to use anything but a table of values

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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Mini-Quiz: Lubricated Coefficient of Sliding Friction

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