Static friction: Will the box move?

[Shannonvi]

Homework Statement

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?

Please help??

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[/B]

 

[PeroK]

Homework Statement

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?

Please help??

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[/B]

Does the force of 156N do anything else?

 

[Shannonvi]

Does the force of 156N do anything else?

I'm not sure what you mean

 

[PeroK]

I'm not sure what you mean

It has an upward component.

 

[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?

 

[gneill]

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