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Unformatted text preview: Measure the force as you pull the block at constant speed (do your best!) both on sandpaper and on metal. Find the average force in each case and then find the coefficient of friction for the case of woodonsandpaper and woodonmetal. Record the average force, the standard deviation, and the number of points included in the average. Turn the block on its edge and repeat the measurements, still with one bar on top. Does the coefficient of friction depend on the surface area? Now return to the large area and place two bars on top. Repeat the measurements. Does the coefficient of friction depend on the normal force?...
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 Fall '09
 LIND

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