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**1. Homework Statement**

A box with a mass of 22 kg is at rest on a ramp inclined at 45 to the horizontal. The coefficients of friction between the box and the ramp are Us = 0.78 and Uk = 0.65.

Determine the magnitude of the smallest force that can be applied onto the top of the box, perpendicular to the ramp, if the box is to remain at rest.

**2. Homework Equations**

Fnet = 0

Ff = UFn

**3. The Attempt at a Solution**

I broke the question down into its x and y components.