Friction

We often simplify problems by assuming that the motion of bodies takes place on “frictionless” surfaces. Strictly speaking, there is no such surface. In real life all motions happening around us are affected by the force of friction. Therefore, a realistic approach to any mechanical problem requires that we identify the frictional forces acting on the system and include them in the respective equations of motion. That is precisely what you will learn to do in the present topic. You will find video lectures on Static and Kinetic friction, Angle of Repose, Angle of Friction, Examples of Motion on Rough Surfaces, Rolling Friction, Drag Force etc. explained and supported by suitable applications and numerical examples.