Editor's note: This is part two of a two-part series about slip hazards. Part one, "Slip sliding away," was in the November issue.
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 tires and roadways).