Determine the coefficient of static friction

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Reference no: EM131355430

1. A horizontal force of 18 lb is required to just start a 45-lb block in motion on a horizontal surface. Determine the coefficient of static friction between the block and the supporting surface

2. A 90-lb block lying on a rough horizontal surface is subjected to a horizontal force P. The coefficient of static friction is 0.33. Calculate the maximum value that P can have before motion impends.

Reference no: EM131355430

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