# How to find Normal force?

by texasgirl03
Tags: force, normal
 P: 3 1. The problem statement, all variables and given/known data If a box that weighs 536N is pulled forward at a constant speed by a force of 150N at an angle of 37 degreees with the ground, what normal force does thte box exert on the supporting surface? ( I am really not sure at all where to begin) formula?
 Emeritus Sci Advisor PF Gold P: 5,196 Hi texasgirl03, You know the magnitude of the force pulling on the box and its angle from the horizontal. So, you can resolve this force into two components, one acting vertically, and the other acting horizontally. That's the starting point. Do you know what a free body diagram is? It would be helpful to draw one here.
 P: 3 Okay i understand so far.. but what is the formula?
 Emeritus Sci Advisor PF Gold P: 5,196 How to find Normal force? If you draw a triangle with the force at 37 degrees from the horizontal, you can use basic trigonometry to get the horizontal and vertical components of that force (the trigonometric ratios, sine and cosine, are what will be used). Draw the triangle that resolves the force vector into its components and it will be clear.
 P: 3 I do not know how to do that. thats why i am asking. I just wanted the formula.
Emeritus