Find Tension in Wire Used in Teeth Braces

[physicsgene]

Homework Statement

What should be the tension in the wire used in teeth braces be, given that the net force exerted on the tooth has to be 0.7806 N? The angle between the two forces is 156.5°.

Homework Equations

I think we may have to find the centre of mass

The Attempt at a Solution

I really am clueless as to how to approach this.

 

[Gokul43201]

You need to draw a picture (the free body diagram for the tooth). After that, it's much easier.

Look at this picture (for instance): http://www.drmehan.com/inovationclear%20(Small).jpg

Draw the top view and zoom in on a single tooth. The angle between the left and right sections of wire is given to you.