Normal force and frictional force

Normal forceA body lies on a plane, then the field will provide a force on the direction perpendicular to the field. The style is called the normal force and given the symbol N.According to Newton's Law of I beam that dwell on the field or flat board policies: F = 0N - w = 0N = 0N = m.g
Description:N = normal force (N)w = weight of the object (N)m = mass of object (kg)g = the speed of gravity (m/s2)
Frictional forceDuring the move on a plane, the beam is accelerated average direction opposite to the direction of motion. So long as the beam moves opposite force is the driving force. In other words, the plane wearing a friction force to the beam.Thus, the friction force is the force going two objects come into contact, and there is relative motion between the two. This frictional force is always hinder the motion of objects.Frictional force between the two fields tangent magnitude depends on the coefficient of friction between the two fields tangent and normal fields. Frictional force is written as the following equation:
f = . N
caption:f = friction force (N) = coefficient of frictionN = normal force (N)
In everyday life there are adverse frictional force, but there is also a benefit. Some examples of harmful friction force is as follows:1) direct friction between engine parts can cause heat so the engine will be damaged. Therefore, given the vehicle's engine so that the surface-surface oil separated by the oil so it does not rub against each other directly.2) The friction between vehicle tires with the road surface will reduce kelajuannya. Friction force can be reduced by paving the road surface so that the vehicle can drive smoothly and quickly.3) Friction of air or wind up with a car can reduce kelajuannya. Frictional force is overcome by the aerodynamic shape of the car is made so that the car can go fast and agile.
The coefficient of static friction is the coefficient of friction when the object is stationary or right will move. The coefficient of kinetic friction is the coefficient of friction when the object is moving. Large coefficient of static friction is greater than the coefficient of kinetic friction.
Some examples of favorable friction force is as follows:1) We can walk on the ground or the floor because of the friction force between the surface of the floor footwear2) The principle of friction on the brake disc (disc) bicycle or motorcycle and the friction between the rubber brake velk wheels on the bike used to slow down the pace3) air friction slows the movement speed of jumpers that can be landed safely.
Friction force is a force that is not conservative. That is, the work done by the friction force depends on the track and also the friction force always opposes the direction of motion of objects so that the force of friction always does negative effort. Generally, this business is converted into thermal energy (heat).