CALCULATION THE COEFFICIENT KINETIC FRICTION USING INCLINE PLANE AND REGRESSION PROCESSES

• Main Author: Lailatul Rizkiyah, Nova
• Format: Theses
• Language: Indonesia
• Subjects: Fisika
• Online Access: https://digilib.itb.ac.id/gdl/view/35453
• Institution: Institut Teknologi Bandung

The kinetic friction coefficient is considered to have a certain value based on a numerical analysis process, although it does not define the true value. If the kinetic friction coefficient in the inclined system is determined as a constant value, this will affect the precision of numerical simulation analysis. If the kinetic friction coefficient in the inclined plane system varies, of course this will be very confusing. Even though this phenomenon is directly related to the security of the system structure, for example in machines or buildings. That is, kinetic friction is relatively influenced by acceleration so it is necessary to record the acceleration value of the object. This is a challenge in the experiment because it is quite difficult to get the precision of object acceleration data as Widayanti has done. Then a new measurement technique is needed to calculate the 'actual' friction coefficient value of the inclined system. In this study a new method was tested, namely adding a sensor at three observation points in an inclined plane to obtain time and angle values so that the kinetic friction coefficient no longer depends on acceleration. Tested several objects, namely the PVC inclined plane and the inclined plane of the alloy (zinc-aluminum). The object that slides is a wooden block coated with aluminum tape, wood (original) and plastic tape. Other objects are wooden blocks, aluminum beams and acrylic beams. The results of the aluminum-PVC kinetic friction coefficient on dry contact were 0.345 similar to the reference of 0.3, in the wet contact the value was smaller at 0.252. The coefficient of friction of PVC-wood kinetic is 0.293 in dry contact as obtained by Henaff of 0.31. On wet contact, the value of the wood and PVC friction coefficient is lower at 0.156. In plastic tape, the dry kinetic friction coefficient is 0.265, the wet kinetic friction coefficient is 0.207. The second, wood and alloy in dry contact is 0.509, and wet contact is 0.73. This is as reported by McKenzie and Karpovich which turns out that the kinetic friction coefficient values tend to rise in wet contact. The aluminum alloy on dry contact is 0.313, and on wet contact is 0.211. In acrylic-alloy there were 0.396 dry contacts, and in bulk contact 0.211