If you have ever driven or walked across a rough or bumpy surface, then you might have heard the phrase “Friction” used. What exactly is friction? How can it be used in our day to day lives?
First of all, friction is defined as the resistance that exists between two objects when they are moving over each other. When they pass over each other, there is a mutual attraction and repulsion. The force that causes the attraction is referred to as kinetic energy. The force that causes the repulsion is called static friction. Friction gives traction which is necessary to walk on without slipping or sliding.
Kinetic energy is a force that an object experiences due to its motion. The amount of this force depends on how fast the two objects are going relative to each other and their position. We can describe it mathematically by finding the force field of an object as a tensor field that is composed of one element, a force, and one term, the distance. We then can write the equation F = (a * f * t), where a is the acceleration, t is time, and f is the net force that act on an object due to its motion.
The relationship between velocity and friction can be described using another set of equations, the kinematics equations. By taking the derivative of the motion, we can solve for the force field and the final equation, F = (k * f * d) where d is the tangential force acting on a contact surface, and k is the kinematic derivative of the final position. That last term, the kinematic derivatives, gives the final value of the frictional force. This can also be solved for the final values of the tangential and radial forces acting on a given point.
If we continue with the car engine, we can continue to explore the relationship between what is friction and the way that it resists motion. We already know that there are three components to a car engine, the fan, the flywheel, and the piston. The combined force of all these different moving parts oppose each other and produces a kinetic energy. If we keep adding more parts to the engine, we will be adding to the total kinetic energy. So if we take our definition of friction and dissect the relationship between what is fiction and what is the car engine, we find that it is the tangential force of the flywheel against the rotor that opposes the rotation of the car engine.
Now if we take a look at a blockbuster and a typical drag strip, we can see the value of static friction for both items. We can calculate the static friction using the law of conservation of energy. The amount of energy needed to move a certain mass is related to its curl ratio. The higher the curl, the lower the energy needed. The value of the static friction is simply the ratio of the curl to the static friction.
Another way to define friction is by looking at the way that the particles slide. A sliding particle has a certain amount of momentum, but the particles don’t always move in the same direction. In some cases they may slide up or down the path, while in other cases they may slide in the same direction, but stop after some distance. Then there is the kinetic energy that the particles impart to the next sliding movement, which can be either forward or backward in the direction.
There are several different types of irregular surfaces that cause friction, including the metal foil, the rubber ring, the carpet, and the wooden surface. Friction can occur between any two surfaces at the same time. This can happen when the two surfaces are sliding against each other, or when the two surfaces are sliding on top of each other. The two types of rubbing that take place when two surfaces rub are referred to as primary and secondary friction. It is possible to create friction between two solid objects by applying a force to them, or by displacing them from their current position.