The answers to each problem follow it in parentheses. 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. Minimal tools for accurately measuring the coefficient of. 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.
An example problem concerning coefficient kinetic friction. Determination of friction coefficient in unconfined. A 10 kg rubber block sliding on a concrete floor 0. 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. Friction problems for the following problems, calculate the force of friction acting on the object. Pdf a simple lab exercise to determine the coefficient of static. A study of friction models and friction compensation materials. Types of dry friction problems first step is to identify. Coefficient of friction problems worksheet with answers. 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. Works through a classic force problem involving the use of the coefficient of friction. Friction and equilibrium a powerpoint presentation by paul e. John is pushing horizontally on a 100 kg bench with a force of 380 newtons. The coefficient of static and kinetic friction between the block.
A 20 kg box is being pulled across a floor by a horizontal rope. You may not embed one of our images on your web page without a link back to our site. Pdf measurements of the static friction coefficient between tin. Friction in wheel rail contacts universiteit twente. Slip impends between both jaws of the clamp and the wedge, and thus f f max n 3 8 10 11 9 geometry 90. Apply the concepts of static and kinetic friction to problems involving constant motion or impending motion. Define and calculate the coefficients of kinetic and static friction, and give the relationship of friction to the normal force. If you would like a large, unwatermarked image for your web page or. The coefficient of static friction between the box and the surface is 0. Tippens, professor of physics southern polytechnic state university a powerpoint presentation by. Pdf this paper describes a quick, simple, and reliable physics lab exercise. The static coefficient of friction increased with higher skin hydration. A 8 kg wooden box sliding on a leather covered desk.
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