Friction

Friction If you do not know how to cope with various situations, driving a car is awful. The risk of accidents increases. Before getting on the bus, you need to know how to handle it appropriately and understand the surrounding environment and environmental conditions. Friction is the resistance to movement between two objects in contact with each other. When resistance is associated with a car tire, it is called towing. The towing point of your car is where the rubber of the tire touches the road surface.

Friction is a reaction to the relative motion of solid objects, fluid objects. Friction is a cause of slowing the movement of objects. There are three kinds of friction. They are static friction, sliding friction and rolling friction. Friction is caused by minute cavities on the surface. These irregularities are the cause of frictional strength. Normal force is defined as the net force compressing two parallel faces together, whose direction is perpendicular to the plane. In the simple case where the mass stays on the horizontal plane, the only component of the normal force is force due to gravity, N = mg. In this case, the magnitude of friction is the product of the mass of the object, the acceleration of gravity and the coefficient of friction. However, the coefficient of friction is not a function of mass or volume, it depends only on the material.

Two solid objects moving with respect to each other are subjected to dynamic friction. In this case, friction is a part of the vertical force acting between the two objects (this part is determined by a number called experimentally determined friction coefficient). Normally, force is independent of contact area and does not depend on the speed with which two objects move.

There are three laws of friction. First, the friction between the object and its surface is proportional to the weight of the object. The heavier the object, the greater the friction. The lighter the object, the less friction. Second, in most cases, the friction between the object and its surface is independent of the surface area of ​​the object. Two objects may have very different surface areas, but if they have the same weight, they apply the same friction. Third, the friction between the object and its surface is independent of the speed at which the object moves - unless the speed is zero.