Recent content by scuddman

Where does the equation F (force of friction) = uN (Muu times normal force) come from? How do you derive the u?

Let me quote the problem: A crate of mass M is placed on a frictionless inclined plane of angle theta. A. Determine the acceleration of the crate after it is released. B. It is possible to solve the problem using "standard" horizontal and vertical axes. Determine the acceleration...

It does matter where you put the axis. That was the whole point of the exercise, I'm told that the solution has a x and y component. The point of changing the axis so that it's normal is so that the normal force isn't perpendicular to the plane of the problem. .../Normal force ../ .o...

If the axis are normal, that is: ---> is X | | is Y and the .../Normal force ../ .o object .| .| mg free body diagram. Gravity has no X component. It is perpendicular to the X axis, and parallel to the Y axis. So gravity can't possibly have a component in the x...

This semester I will be taking classical physics for the 3rd time in my life. I have classically done badly in mechanics. I go to class, I take the notes, I do the homework, but I fail the exams. I just don't get it. Even if I have solutions to the homework problems, the exams always...

A crate of mass M is placed on a frictionless inclined plane of Angle theta. Determine the acceleration after the crate is released. |\ |..\o crate of mass m |...\ |___b\ angle b which is theta. I know how to do this problem if I set up the axis a certain way. If I slant...