Newton's first law states that, simply, an object in motion will stay in motion unless acted upon by an unbalanced force. It also gives the idea that an object that is at rest will stay at rest unless acted upon by an unbalanced force. Friction mostly has to do with the first part of Newton's first law. The unbalanced force can be practically anything, like a shoe or tree. If there isn't anything that is going to counteract with the moving object, it will still stop. Why? Friction. It counts as an unbalanced force because it interferes with the motion of the object and in addition to that, it moves in the opposite direction of the moving object.
First, I will assume your question is "What are the laws of kinetic friction?".
Second, I don't know if you are looking for a certain law about friction or a list of properties of friction. Anyway, I found this after a 5 second Google search, which you apparently could not do:
If two bodies do not slide over each other the force of static friction fs is given by fs<=msR.
If the bodies slide over each other the force of kinetic friction is given by fk=mkR.
The force of static frictions and the force of kinetic friction fk do not depend on the area of contact as long as the normal reaction R is same.
The third law of friction was proposed by Coulomb. It says, that friction in sliding of two solids (unlibricated) against one another is independent of the relative velocity of the sliding motion.
The law does not apply to very low velocities as, under such conditions, the friction force tends to decrease with the increase in sliding velocity until certain velocity is reached. Also with lubricant present (especially fluid) the friction resistance can be strongly dependent on both velocity and load.
There is no law of conservation of kinetic energy. The main reason for this is the fact
that kinetic energy is not necessarily conserved. Energy can change freely, back and forth,
between kinetic and potential. Just sit and watch a swinging pendulum some day when
you have the time.
Force of Friction = u x F u is the constant for that surface, and F is the force being applied
Work = change in Kinetic Energy Because friction acts in the opposite direction of the motion of an object, kinetic energy must be decreased in order to maintain the above equation. Friction opposes motion. Friction converts the kinetic energy of a particle into heat and sound.
Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.
They are different because static means "not in motion" and kinetic means "in motion". Kinetic friction means friction that is moving and static friction means friction that is not moving.
coefficient kinetic
The coefficient of kinetic energy is a constant for friction acting as a retarding or dissipative force to calculate the total force on the object. The coefficient of friction u is represented in equation by the relation F = u*N, where N is the normal force.
Work = change in Kinetic Energy Because friction acts in the opposite direction of the motion of an object, kinetic energy must be decreased in order to maintain the above equation. Friction opposes motion. Friction converts the kinetic energy of a particle into heat and sound.
There are two types of friction : static friction and kinetic friction. Static friction occurs when two objects are touching but are not moving relative to each other. For example, static friction can prevent a box from sliding down a slope. The static friction between this box and the slope (and between any objects) can be calculated using the equation : Fs = µsN where µs is the coefficient of static friction and N is the normal force. Kinetic friction occurs when two objects are touching and moving relative to each other. For example, the kinetic friction slows down a box sliding down a slope. Also, when two surfaces rub together, there is kinetic friction. The kinetic friction can be calculated using the equation: Fk= µkN where µk is the coefficient of kinetic friction and N is the normal force.
Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.
No, static friction is generally stronger than kinetic friction.
Kinetic friction is the friction that arises between surfaces in relative motion. Sliding friction is the friction that occurs when an object slides over a surface.
They are different because static means "not in motion" and kinetic means "in motion". Kinetic friction means friction that is moving and static friction means friction that is not moving.
there is more surface area contact with kinetic friction as opposed to sliding friction
Kinetic friction is the friction that applies when an object is moving; static friction is the friction that applies when the object is not moving. Static friction must always be greater than, or equal to, kinetic friction.
The coefficient of kinetic energy is a constant for friction acting as a retarding or dissipative force to calculate the total force on the object. The coefficient of friction u is represented in equation by the relation F = u*N, where N is the normal force.
coefficient kinetic
Sliding kinetic friction is when two moving (kinetic) objects rub (slide) against each other, creating friction. Sliding friction creates heat, unlike rolling or fluid friction.