- #1

Bahrbarian

- 2

- 0

## Homework Statement

A block with a mass of m is initially moving up the incline and is increasing speed with an acceleration of a. The applied force F is horizontal. The coefficients of friction between between the block and incline are μs=S and μk=K. The angle of the incline is θ.

What is the magnitude of F?

## Homework Equations

I know Im using f=ma. I just am confused as to how all the forces are found, and ofr their directions, and how to find the force of friction.

## The Attempt at a Solution

I left all of the terms in just variables so I would learn how to solve this, not just the answer. I have been doing this on some online homework, so I can check my answer, and I don't understand what I am doing wrong. Magnitude of the normal force is equal to F+mg, I think, and then I split that into horizontal and vertical components. And the force of friction should be SxN, which would be Sx(F+mg), I think? I have to eventually calculate what F equals, and what the force of friction equals. I also think that the coefficient for static friction is extraneous information, but Im not positive. Any help would super awesome.