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The Army is trying to determine how their boots compare to typical commercial footwear. One of the teststhat they are conducting is a friction test.

The Army is trying to determine how their boots compare to typical commercial footwear. One of the teststhat they are conducting is a friction test. Below is a table of the coefficients of static friction for the forefootand heel of several different shoes tested on oily cement. Make sure it is clear how you calculated the valuesin the table and how you made the slipping determination.


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Below is a graph of the vertical and anterior/posterior (AP) ground reaction forces of a subject running on aforce platform. Assume that maximum braking force occurs when the heel is in contact with the ground andthe maximum propelling force occurs when the forefoot is in contact with the surface. Determine which ofthese 16 conditions would cause the person to slip if the forces below were to occur on the oily cement ratherthan the force platform.


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Write in the: maximal static fi'iction fomefimax) for each condition. Identify 111: conditions that will cause a slip. chion Combat Jungle: Nike Air Nike X— Rching Roebok Rookport Rockport
Boot Boot Running Trainer Pump Hiking Walking ---------
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