# How does the force friction change as the weight increases?

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Mr. T. Wood
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May 1, 2014

Friction is due to the weight of the object and the coefficient of friction. The coefficient is a number that tells you how much friction you would expect between pairs of surfaces.

Force friction= weight x coefficient of friction

So as the weight increases so does the amount of friction.

Note on "coefficients of friction":

Sand paper may have a coefficient of 0.78 (the closer to 1, the more friction you will have), and a piece of ice sliding across a sheet of ice may have a coefficient of 0.02, meaning almost no friction.

Check this link for listed values:

http://www.engineeringtoolbox.com/friction-coefficients-d_778.html

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