- #1
gandharva_23
- 61
- 0
Homework Statement
Can coefficient of friction between any 2 surfaces be greater than 1 ? If not why ?
gandharva_23 said:if both the board and the object are coated with a sand paper then the object would slide when the board makes greater angle with the forizontal . how can i define coefficient of friction between 2 surfaces ?
gandharva_23 said:you mean tan (theta) = mu relation ? ok i think i got it ... theta can be between 45 to 90 for high mu surfaces . that implies mu will be greater than 1 . am i right now ?
gandharva_23 said:How can i define coefficient of friction between 2 surfaces ?
The coefficient of friction is a measure of the amount of resistance between two surfaces when they are in contact with each other. It is a dimensionless quantity that represents the ratio of the force required to move an object over a surface to the force pressing the two surfaces together.
The coefficient of friction is calculated by dividing the force required to move an object over a surface by the force pressing the two surfaces together. This can be done using a friction force sensor and a weight scale, or by measuring the angle at which an object starts to slide down a ramp.
The coefficient of friction can be affected by a variety of factors, including the type of materials in contact, the roughness or smoothness of the surfaces, the presence of lubricants or contaminants, and the temperature and humidity of the environment. Additionally, the coefficient of friction can vary depending on the direction of motion and the amount of pressure applied between the two surfaces.
When the coefficient of friction exceeds the limits, it means that the amount of resistance between two surfaces is higher than what is considered normal for those materials. This can result in increased wear and tear on the surfaces, reduced efficiency of machines or equipment, and potentially dangerous situations where the surfaces may become too difficult to move or control.
There are several ways to reduce the coefficient of friction when it exceeds the limits. One approach is to use lubricants or coatings on the surfaces to reduce the amount of friction between them. Another method is to change the materials of the surfaces to ones that have a lower coefficient of friction. Additionally, adjusting the pressure or temperature of the environment can also help to decrease the coefficient of friction.