jrk613 said:I was wondering how to modify F=ma and put in either static or kinetic friction coefficient. I assume it's something like F-(friction coef) but I'm just not sure, any ideas or websites someone can direct me to? thanks
Not the object as a whole. Only the motion of the contact point. For the FBD of a rolling wheel or an entire car for example, friction can turn out to be in the direction of motion.berkeman said:The direction of the friction force vector is to oppose motion of the object (whether static or kinetic friction)
The general formula for friction is F = μN, where F is the force of friction, μ is the coefficient of friction, and N is the normal force.
The coefficient of friction is determined experimentally by measuring the force required to move an object across a surface divided by the normal force between the object and the surface.
The coefficient of friction is affected by the nature of the two surfaces in contact, the roughness of the surfaces, and the presence of any lubricants or contaminants.
Yes, the coefficient of friction can be greater than 1. This means that the force of friction is greater than the normal force, resulting in a very strong resistance to motion.
Friction acts in the opposite direction of an object's motion, so it can slow down or stop the object's motion. It also helps to provide traction and stability for an object moving on a surface.