Static friction is a force that keeps an object at rest. It must be overcome to start moving the object. Once an object is in motion, it experiences kinetic friction. The maximum force of static friction is 5145 N, and therefore the applied force of 5500 N is enough to overcome it, and start moving the sled.

Static friction is a force that hinders the movement of an object moving along the path. When two fabrics slide over each other, this friction occurs. There’s friction all around us. When we walk, for instance, our feet are in touch with the floor.

Static friction is caused by adhesion, light chemical attraction between two surfaces. The force of static friction can be calculated by taking the coefficient of friction between the two surfaces and multiplying it by the normal force that the surface is applying to the object.

In general, the friction is of the following two types:

• (1) Static friction. It is the friction, experienced by a body, when at rest.
• (2) Dynamic friction. It is the friction, experienced by a body, when in motion.
• (a) Sliding friction.
• (b) Rolling friction.
• (c) Pivot friction.
• 14.7.
• 14.7.
• 14.7.

Kinetic friction is less than the static friction because in kinetic friction one object is in moving condition & there is less inter molecular attraction b/w the objects whereas in static friction there is relative motion & thus there is much more inter molecular attraction & this is only why we need less force to …

1 Answer. Well the answer to your question about mixed static and kinetic is yes you can have both static and kinetic friction between two objects at the same time (particularly easily with tires). This force vector is usually split up into a “normal”, or “support” force and a frictional force.

A method to determine the static coefficient of friction is to measure the angle at which an object starts to slide on an incline or ramp. A method to determine the kinetic coefficient of friction is to measure the time is takes to stop an object.

Friction (like friction drag) is a contact force which results from two surfaces contacting each other. Static friction is considered a self adjusting force because it wants to the objects to remain at rest and not move. At this point, static friction becomes kinetic friction and the object begins to move.

The pattern we noticed between the values of the coefficients of static and kinetic is that the coefficient for static friction is larger than that of the kinetic friction.

3 Answers. The coefficient of friction should in the majority of cases, remain constant no matter what your normal force is. When you apply a greater normal force, the frictional force increases, and your coefficient of friction stays the same.

Does the force of kinetic friction depend on the weight of the block? Explain. Yes. The equation for kinetic friction is F= coefficient of friction * Normal force.

Friction DOES NOT depend on the mass of the body. It depends on the normal force and the roughness of the surface in contact. But the normal force is responsible for friction. Because if you change the angle of inclination, friction changes with proportion to the change in normal force, mass remaining constant.

Friction increases with mass because friction depends on the normal force, which is related to the weight of an object, which depends on mass.

Friction is a contact force when two surfaces interact. Notice that both of these friction formulas ONLY depend on the coefficient of friction and the normal force. It does not depend the area of contact, it doesn’t depend on the sliding speed.

HARMFUL FRICTION

• Slipping on ice.
• Wet roads.
• Mudslides.

Since friction is a resistive force that slows down or prevents motion, it can be a nuisance, because it can hinder motion and cause the need for expending extra energy. Friction can also cause parts in contact to heat up and can cause parts in contact to wear out.