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Subject: Re: What's the coefficient of friction between a slide and a person?
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Date: 03/10/03 at 7:50 AM
Posted by: Greg Caudill
In Reply to: Re: What's the coefficient of friction between a slide and a person? posted by Melanie Hall on 03/08/03 at 8:17 AM:
Check a Physics or Statics textbook. The problem of a person on a slide is the same as a block on an incline. Are you after the static or kinetic coefficient of friction, they are different. Static Coefficient of Friction:Static Coeff. = tan(angle) where angle is the maximum angle of inclination before the person begins to move.Kinetic Coefficient of Friction:Kinetic Coeff. = (v)^2/(2*g*x) where v=velocity (distance/time), g=acceleration of gravity, x=distnace traveled. This assumes that the coefficient of kinetic friction remains constant as the speed changes, which is not entirely true but probably good enough for this type of problem. Acceleration of gravity = 32.2 ft/sec^2Determine the velocity by measuring the time it takes to travel down the distance (length) of the slide.x=distance traveled. Work the problem in the correct units (use feet or convert to other units).
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