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## Homework Statement

Calculate the force needed to pull a mass of 20 kg at a uniform slow speed up a plane inclined at an angle of 30 with the horizontal if the coefficient of kinetic friction is 0.20.

## Homework Equations

W

_{N}= w cos [tex]\vartheta[/tex]

W

_{T}= w sin [tex]\vartheta[/tex]

[tex]\mu[/tex]

_{s}= tan[tex]\vartheta[/tex]

## The Attempt at a Solution

I don't even know how to get started.