Friction doesnt not depend on the surface area...but the force of friction does!
We cannot change the friction of a material but we can change the force due to that friction on another material in contact with it.
Using this concept, racing cars have bigger tires to minimise the force of friction acting on them. They cannot change the friction of the road, so they change the resultant force on the tires.
The strength of the force of friction depends on the types of surfaces involved and on how hard the surfaces push together.
No. The coefficient depends only on the two surfaces which are in contact.
The coefficient of static friction between two surfaces is 0.60.
No, increasing the mass of the block does not directly affect the coefficient of kinetic friction. The coefficient of kinetic friction depends on the nature of the surfaces in contact and does not change with mass.
Surfaces with a high coefficient of friction include rubber on concrete, sandpaper on wood, or a shoe sole on carpet. Typically, surfaces that are rougher or have more texture will have a higher coefficient of friction.
A higher coefficient of friction indicates that two surfaces in contact have a greater resistence. A lower coefficient of friction indicates that the two surfaces in contact have less resistence. Soccer cleats on grass have a greater coefficient of friction than skates on ice.
A higher coefficient of friction indicates that two surfaces in contact have a greater resistence. A lower coefficient of friction indicates that the two surfaces in contact have less resistence. Soccer cleats on grass have a greater coefficient of friction than skates on ice.
The coefficient of friction between two surfaces is highest when the surfaces are rough and have a large amount of resistance to sliding past each other. Smooth surfaces or surfaces with lubricants have lower coefficients of friction.
The coefficient of friction is influenced by factors such as the roughness of the surfaces in contact, the materials of the surfaces, and the presence of any lubricants or contaminants.
Yes but make sure you are clear in your understanding between the coefficient of friction and the force of friction. The force of friction is the force that resists the motion of two surfaces moving against one another. The amount of friction is determined by the product of the coefficient of friction and the normal (perpendicular) force that is pressing the two surfaces together. The coefficient of friction is a unit-less constant, that indicates how two surfaces compare to two other surfaces that are being pressed together the same amount. If the normal force is the same on two pairs of surfaces the pair of surfaces with the lowest coefficient of friction will experience the lower force of friction.
-- The friction force changes, and is directly proportional to the normal force. -- The coefficient of friction doesn't change. It is the proportionality constant in the first statement.
In this scenario, the coefficient of friction is constant if the surfaces in contact and the conditions remain the same.