CE 2450 Chapter : Student Handout 36
Document Summary
S coefficient of static friction. When the block is on the verge of sliding, n and fs combine to create a resultant rs. The angle that rs makes with n is called the angle of static friction, s. K coefficient of kinetic friction. 8. 2 problems involving dry friction. Types of friction problems: no apparent impending motion. Problems are strictly equilibrium problems with the number of unknowns equaling the number of available equilibrium equations. Once the frictional force is determined, it must satisfy the inequality. N: impending motional at all points of contact. The total number of unknowns is less than the number of available equilibrium equations for tipping. As a result, several possibilities for motion or impending motion exist and we must determine which kind of motion occurs. Example: problem 8- 5. Assume the wall at b is smooth. The center of gravity for the man is at g. neglect the weight of the ladder.
