Chapter 12, Problem 87P

A particle is acted on by forces given, in newtons, by ${\stackrel{\to }{F}}_1=8.40\hat{i}-5.70\hat{j}$ and ${\stackrel{\to }{F}}_2=16.0\hat{i}\text{ + 4}.10\hat{j}$. (a) What are the x component and (b) y component of the force ${\stackrel{\to }{F}}_{\text{3}}$ that balances the sum of these forces? (c) What angle does ${\stackrel{\to }{F}}_{\text{3}}$ have relative to the +x axis?