# Coefficient of Friction

Topics: Friction, Force, Mass Pages: 4 (1076 words) Published: November 16, 2012
Coefficient of Friction Lab

Abstract
The resisted force that acted along the tangent of two surfaces that were in contact was called friction. Friction was opposed to motion, and it acted in the opposite direction, where the surface of the object slid against the surface of the other object. The two types of friction that exist were called static friction and kinetic friction. When two surfaces are at rest with each other, but a push is caused to convey one of the surfaces to slide over the other was called static friction. However, the friction that was used in the lab was kinetic friction. Kinetic friction occurred when two surface were moving with contact to each other. The coefficient of kinetic friction is a constant shown as μk. The kinetic frictional force (fk) was given by the following equation: (fk= μkN), where N represented the normal force, which was the force that each body exerts on the other body, and acts perpendicular to each surface. The way that friction force is calculated is by the followed calculation: Ff=μFN, where (μ) was the coefficient of friction and (FN) was the normal force. Now in order to pinpoint the force of friction, the coefficient of friction should be figured out first. Now the way that the coefficient of friction was retrieved, the tension force (FT) was divided by the weight (Fg). An inclined plane that has an angle of θ was adjusted as shown in the following diagram:

2

If the block was placed on the plane, and the angle was slowly increased, the block would have began to slip at some angle. Now the normal force (N) acted perpendicularly to the plane, and a component of the weight of the block, acted in the opposite direction. Though when the angle is increased, the more force it took for the block to slide against another surface. So as the angle was increased, the friction cultivates, but when the angles decreased, so did the friction.1 Now some of the factors that can affect friction are the body surfaces....