# Homework Help: Static friction: Will the box move?

1. Dec 1, 2016

### Shannonvi

1. The problem statement, all variables and given/known data
A 55.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300. A force of 156 N is applied to the box directed at an angle of 18.0 above the horizontal. Does the box move?

3. The attempt at a solution
156 (cos18)= .300 (55kg×9.81m/s)
148.36N = 161.865 so no, the box wouldn't move. but my answer is wrong

2. Dec 1, 2016

### PeroK

Does the force of 156N do anything else?

3. Dec 1, 2016

### Shannonvi

I'm not sure what you mean

4. Dec 1, 2016

### PeroK

It has an upward component.

Last edited: Dec 3, 2016
5. Dec 3, 2016

### TJGilb

Assuming you're saying the applied force has an upward tilt, break it down into its x and y components. How does this interact with the gravitational force acting on the mass?

6. Dec 3, 2016

### Staff: Mentor

Moderator's note: Thread title modified to make it more descriptive of the problem being addressed. Thread titles should not be overly generic.