Friction exerts a force opposite the direction of the object's motion. For example, if you were pushing an object to the right (looking from a side view) the friction would be facing left.
The maximum static friction force that can be exerted on an object is equal to the coefficient of static friction multiplied by the normal force acting on the object.
The maximum static friction that can be exerted between two surfaces in contact is equal to the coefficient of static friction multiplied by the normal force between the surfaces.
Slideing Fiction, Friction, and Static Friction.
The maximum static friction force that can be exerted between two surfaces in contact is equal to the product of the coefficient of static friction and the normal force pressing the surfaces together.
The force of friction is exerted in the direction opposite the direction of motion, between two surfaces that are in contact with each other. It acts to hinder motion and opposes the relative motion between the surfaces.
The force exerted only when two objects are touching is called friction. Friction occurs as a result of the resistance between the surfaces of the objects when they move against each other.
Friction is a force and is the result of any force acting on a object. It is usually associated with two sliding objects or an object sliding across a plane. When a force is exerted on an object an opposing force is created by friction. The opposing force is equal to the exerted force until the exerted force exceeds the limiting friction. The limiting friction is determined by the coefficient of friction between the two surfaces and the "weight" of the object. To put it another way, imagine pushing a sheet of sandpaper across a rubber mat, which would have a high coefficient of friction. The weight of the sandpaper is minimal so the limiting friction is rather small. Now put a 5kg weight on the sandpaper and it becomes much more difficult to get the sandpaper to slide. Max friction = μ.N μ = coefficient of friction N = Normal force("weight")
However many there are exerted on the object. Usually there is gravity, friction, and another force exerted on the object.
Because friction is exerted against the direction of motion
"friction"
Friction
The friction force exerted by fluids is typically referred to as viscous drag. This force arises due to the friction between the moving object and the fluid it is moving through. Viscous drag depends on the velocity of the object and the properties of the fluid.