Although there are many reasons for slips—wet surfaces,
spills, weather hazards, etc.—there also are many ways to
prevent slips and keep your feet firmly on the ground.
As mentioned in November's column, friction is a physics
principle that contributes to falls. Friction is measured by the
coefficient of friction—the ratio of an object's weight to
the frictional force required to move it.
Federal regulations specified in the Americans with Disabilities
Act recommend a coefficient of friction of 0.6 or higher for
walking surfaces. A usual measurement for rubber on dry asphalt is
between 0.6 and 0.7 (measured between car...
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