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Bitmap Image  |  1995-06-29  |  26.5 KB  |  226x317  |  8-bit (36 colors)  |  [TEXT/LMAN]
   ocr: Friction THE - FORCE that resists movement between two things that are in contact FRICTION can be useful - without it, we couldnot grip the ground to walk or run. But it can also be a nuisance - if two moving parts of a machine ruba against each other, for example, friction results in unwanted heat and the wearing away of the parts.