Practice Problems on Laws of Friction

Problem 1: The 50 kg mass block rests on a slope of an angle 30°. The static coefficient friction between the block and the inclined plane is 0.4. Determine the angle greater than which the block will slide away from the support surface.

Problem 2: A 200 N object is moving horizontally through a surface whose kinetic friction coefficient is 0.2. Find the magnitude of kinetic friction force resisting the motion of the object.

Problem 3: A mass 30 kg is placed on the rough surface. The static friction coefficient is 0.5 and the coefficient of friction rolling is 0.3. Each question will mainly have two types of forces. A force of 200 N will be applied horizontally. Thus, the object will move at constant velocity or may move and calculate the acceleration.

Problem 4: For the case of the rough inclined plane, we have a 1000 N object that is placed at a 20-degree angle. Coefficient of friction = 0.25 Make calculations about the force of friction which is the resultant of the tangential component of the normal force on the object.

Problem 5: The case that assumes there is a 500 Newtons box placed on a vertical wall is being studied now. If the lack of static friction coefficient between the wall and the box is 0.6, tell if the box will remain in place or if it will begin sliding down.

Friction is a fundamental force that affects our everyday lives. When we slide a book across a table or walk on a slippery surface, friction comes into play. There are various laws which govern the phenomenon of friction such as Amonton’s and Columnb’s Laws. In this article, we will discuss all the laws which help us understand the concept of Friction.