Minimal tools for accurately measuring the coefficient of. Pdf a simple lab exercise to determine the coefficient of static. A 8 kg wooden box sliding on a leather covered desk. Tippens, professor of physics southern polytechnic state university a powerpoint presentation by. An example problem concerning coefficient kinetic friction. A 10 kg rubber block sliding on a concrete floor 0. The coefficient of static and kinetic friction between the block. Some of the worksheets below are coefficient of friction problems worksheet with answers, several calculations involving coefficient of friction, types of friction like rolling friction, sliding friction, fluid friction, static and kinetic friction. Pdf this paper describes a quick, simple, and reliable physics lab exercise. The coefficient of static friction between the box and the surface is 0. Coefficient of friction problems worksheet with answers. A study of friction models and friction compensation materials.
Define and calculate the coefficients of kinetic and static friction, and give the relationship of friction to the normal force. Apply the concepts of static and kinetic friction to problems involving constant motion or impending motion. Tyreroad friction modeling materials technology eindhoven. Since we have already used symmetry in labeling the forces on the freebody diagram, the f y equilibrium equation degenerates to 0 0 and gives us no new information.
Types of dry friction problems first step is to identify. Given that the coefficient of kinetic friction between crate and floor is. You may not embed one of our images on your web page without a link back to our site. Works through a classic force problem involving the use of the coefficient of friction. The answers to each problem follow it in parentheses. Friction in wheel rail contacts universiteit twente.
Pdf measurements of the static friction coefficient between tin. Friction coefficient between rubber and solid substrate effect of rubber thickness article pdf available in journal of the physical society of japan 764 april 2007 with 1,323 reads. A widely used method treated in a variety of ways i. Friction problems for the following problems, calculate the force of friction acting on the object. A 20 kg box is being pulled across a floor by a horizontal rope.
If you would like a large, unwatermarked image for your web page or. Kinetic friction and static friction physics problems, forces, free body diagrams, newtons laws duration. Friction cone friction coefficient reflects the roughness. A lot of friction can sometimes be useful in our everyday lives, but at other times it can be a nuisance and not helpful at all. Friction is sometimes helpful and sometimes not helpful at all. John is pushing horizontally on a 100 kg bench with a force of 380 newtons.
Slip impends between both jaws of the clamp and the wedge, and thus f f max n 3 8 10 11 9 geometry 90. The static coefficient of friction increased with higher skin hydration. Friction and equilibrium a powerpoint presentation by paul e. Problems involving dry friction school of mechanical engineering8 9 all applied forces known coefficient of static friction is known determine whether body will remain at rest or slide all applied forces known motion is impending determine value of coefficient of static friction.