How do you determine the coefficient for static friction?

To measure the static coefficient of friction, you take the value of the force just as the object starts to move. Doing the same experiment with sliding or kinetic friction, you want to take your reading when the object is sliding at an even velocity. Otherwise, you will be adding in acceleration force effects.

How do you find the coefficient of static and kinetic friction?

The formula is µ = f / N, where µ is the coefficient of friction, f is the amount of force that resists motion, and N is the normal force.

What factors change the coefficient of static friction?

The friction force depends on two factors:

• a) The materials that are in contact. The two materials and the nature of their surfaces.
• b) The force pushing the two surfaces together. Pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other.

How do you calculate static friction?

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. On a flat surface, the normal force is equal to the force of gravity acting down on the object.

How to calculate the minimum coefficient of friction?

First,determine the net horizontal force acting on an object. Calculate the net force acting on a stationary or moving object.

Next,determine the normal force acting on an object.

Calculate the coefficient of friction Calculate the coefficient of friction using the normal force and net horizontal force.

How to solve for static friction?

Determine the object in static equilibrium you need to analyze and isolate it in a force diagram.

Define a linear (x,y) coordinate system for force components,and a rotational coordinate system (positive rotation direction) for torques.

Extend each force vector with a dotted line as far as it will go on the page in both directions.

What is the lowest coefficient to friction?

Most dry materials in combination have friction coefficient values between 0.3 and 0.6. Values outside this range are rarer, but teflon, for example, can have a coefficient as low as 0.04.