An Experiment on the Friction Coefficient of Different Materials on an Inclined Steel Plane

The Congress authorized the amount of copper in a penny after 1982 to be 2.5% by mass. The mean value found from this lab was 3.018%. There were no discernable variations based off of the penny’s apperance or mint date. The value reached from this lab is significantly different from the authorized copper content.

* Copper, gold and aluminum are all alloyed with other metals to make them harder.

From the calculations, the average coefficient of friction on dry road was 0.705 and the average frictional force was 8016.27 N. The average coefficient of friction on wet road was 0.553 and the average frictional force was 6299.6 N. As stated before, a patterned tire gives typical dry and wet frictional coefficients of about 0.7 and 0.4, respectively (Jones, 2001).

With the worm screw being in constant contact with the worm wheel, there has to be consideration of wear due to friction when selecting the material. In order to avoid amounts of wear that will be detrimental to performance, the shaft’s material must have a high surface hardness1. It’s important that this is achieved without the hardening of the entire thread because this will result in the material becoming more brittle. A

There are two different types of frictional coefficients, static and kinetic. The coefficient of static friction is the frictional force that must be overcome before any motion commences. It is caused by the minuscule contact points between our tires and the riding surface (There is frictional losses present in every mechanical connection on the bike

Overall, the 1018 and 1045 steel specimens displayed similar relationships between the heat-treating procedures. The 1045 steel had a greater tensile strength in all states except for the quenched state. In general, the 1018 steel specimens were more ductile than the 1045 steel specimens in all states.

The aim of the experiment is to examine how the acceleration of the car differs when the angle of inclination of the ramp is amplified and to record and analyse findings.

A spectrophotometer helps to determine absorbances of the samples that you have. The average amount of copper in the brass sample we got was 57.7%. This value is on the higher side being over 50%. I believe that brass is mainly made of copper so the higher value is a good thing. Our curve that we got for our graph is very linear.

Friction is an opposing force. It acts in the opposite direction of the marble or the roller coaster cart. When designing a roller coaster you want to have as little friction as possible. This goes the same way with my model track, i want to make sure the track is designed to where friction will not be a worry factor but i want there to be enough of it to keep the marble from going to fast and running off the track. The force of gravity will help take some of the pressure off the importance of friction but with the marble being so light i am more than likely going to apply more friction only because the weight of the marble is so light. If the laws are correct i should have a successful marble

I utilized the coefficient of friction values based on skid testing conducted by the Institute of Police Technology and Management, (IPTM). IPTM testing, indicates a coefficient of friction of .90 - 1.50 for a vehicle furrowing.

10 materials were chosen of various types from wood and metal to polymers in order to make sure that a material was not overlooked.

In science class, students were given a propeller and rubber band to add propulsion force to the car. The car without any changes used thick black wheels in the front and thin white wheels with tires in the back. It used heavier axles with the thick wheels and light, aluminum axles with the thin wheels and clay connecting the bearing to the axle. In the first iteration, clay was removed. The fifth iteration changed the wheels in the front from large wheels to thin wheels with tires. The sixth iteration changed the axle in the front to the same aluminum axle that was in the back. The car performed at its best after the sixth iteration because it traveled further distance and was lighter.

The surface coating field is a rapidly developing area of science and technology that offers new methods and techniques to control friction and wear. New coating types are continually being developed and the potential applications in different industries are ever growing, ranging from machine parts and consumer products to medical instruments and prostheses. stainless steel fades when exposed to the environment. Modern technology increasing stresses on the material. Both the uses and the stresses have grown at a maximum rate than the number of materials that can be used to meet them. Although lot of work is done by producing new alloys with improved properties, there is a limit to the protection that can be afforded by this means alone. For this reason coatings have played an important role in protecting the structural metals from environmental attack.

Steel products were defined by several attributes which determined the product application and defined quality. Grade described the metallic (chemical) composition of the steel, or the elements added to the basic recipe of iron and carbon to create the desired properties. Product described the shape of the product, including semi-finished shapes (blooms, billets and bars) and finished shapes (wires and coils). Surface finish described the smoothness and polish that could be applied to the material’s surface to enhance presentation. Size described the latitudinal and longitudinal dimensions of the product. Structural quality described the absence of breaks in the inner metallic structure. Surface quality described the absence of cracks or seams on the surface. Because specific applications called for specific attributes, many products were customized along one or more attributes for the customer. However, of all attributes, customers valued most the grade, which determined product performance.

Overall, the experiment succeeded that the metals show the theoretical properties. Differences existed in the mathematical calculation of the actual length. These differences, however, it can be accounted for by experimental error; more over there are uncertainty on purity of the