Determine the coefficient of static friction
Mechanical Engineering
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.
