Today we learned about four different kinds of friction: static, sliding, rolling and fluid.
Tonight's homework is to answer the following: Knowing what we know about these four types of friction, why do you think fluids are often placed between the sliding parts of machines? (think of a bicycle chain, or the bearings on a skateboard) What would happen if there wasn't any fluid? What would be the difference? Why is it beneficial to use fluid? (1 long paragraph to half a page).
The second part of tonight's homework is simply to check out this website and make a few searches and see what information you find: www.wolframalpha.com
Good luck!
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