Friction
Friction means force that resists the movement of one object over another, resulting heat. The force behaves in the converse direction to the mode an object needs to slip. If a car requires to stop at a stop mark, it slows because of the friction during the brakes and the wheels.
Friction is the strength supporting the similar sideways motion of powerful surfaces, changeable layers, or material component in contact. It is commanly subdivided into lots of varieties:
1. Dry friction supporting similar sideways motion of two powerful surfaces in contact. Dry friction is also partition into changeless friction during non moving surfaces, and kinetic friction between moving surfaces.
2. Lubricated friction or supports similar sideways motion of two powerful surfaces divided by a layer of gas or liquid.
3. Fluid friction is also applied to explain the friction during layers within a fluid that are moving similar to each other.
4. Skin friction is a component of drag, the compel supporting the motion of a solid body through a fluid.
5. Internal friction is the compel supporting motion between the elements making up a powerful material while it undergoes deformation.
Friction is not a basic concept, as it is derivative from electromagnetic concept between charged particles, excluding electrons, protons, atoms, and molecules, and so cannot be considered from first principles, but instead should be searched empirically. When contacting surfaces move relative to each other, the friction between the two surfaces converts kinetic power into thermal energy, or heat. Opposite to earlier clarification, kinetic friction is now knowing concept not to be caused through surface irregularity but through chemical bonding during the surfaces. Surface irregularity and contact location, however, do influence kinetic friction for micro and nano scale objects where surface location compel control inertial forces.
Uses of friction:
Walking:
You could not go or walk without the friction between your shoes and the ground. As you try to step forward, you push your foot backward. Friction keeps your shoe to the ground, permiting you to walk. Calculate how tough it is to walk on slippery ice, where there is shortest friction.
Writing:
If you are writing with a pencil needs friction. You can not keep a pencil in your hand without friction. It would skip out when you tried to keep it to write. The graphite pencil led would not become a sign on the paper without friction.
Driving car:
Your car would not begin moving if it wasn't for the friction of the tires against the street. With no friction, the tires would just spin. Likewise, you could not stop without the friction of the brakes and the tires.
