The discussion revolves around identifying the correct equation for the minimum coefficient of friction, particularly in the context of motion, possibly involving circular motion or inclined planes. Participants are exploring the relationship between forces and the coefficient of friction.
The discussion is active, with participants providing insights into the units of the proposed equations and questioning the assumptions behind the definitions of the coefficient of friction. Some guidance has been offered regarding the need to analyze units, but no consensus on the correct equation has been reached.
Participants mention the need for context in understanding the minimum coefficient of friction, suggesting that it may depend on specific conditions such as preventing sliding on an incline or maintaining circular motion.
It's what we "know" that hurts! The Newton is a unit of force. While friction is a force, the coefficient of friction is not.BigMann said:I know that the coefficient of friction is Newtons
The coefficient of friction is the ratio of two forces, the force of friction divided by the normal force. It has no units; it is a pure number.BigMann said:maybe I'm not understanding the units of the coefficient of friction. Could you explain to me what they are?
This does not mean much out of context. By minimum value of the coefficient of friction I assume you mean the minimum value required to achieve some condition, such as the minimum value required to keep a block from sliding down an inclined plane or to keep a car going around a curve from skidding. There is no single equation for this. It comes from figuring out how much frictional force is required to acomplish something and dividing that required force by the normal force in the problem.BigMann said:stupid question because I forgot the equation
What is the equation for the minimum value of the coefficient of friction?
is it m(v^2/r) or v^2/gr