Chapter 5, Problem 82AP

Shown below is a body of mass 1.0 kg under the influence of the forces ${\stackrel{\to }{\text{F}}}_{\text{A}},{\stackrel{\to }{\text{F}}}_{\text{B}}$ ,and $m\stackrel{\to }{\text{g}}$ . If the body accelerates to the left at $2{\text{0 m/s}}^{\text{2}}$ , what are $\stackrel{\to }{{\text{F}}_{\text{A}}}$ and ${\stackrel{\to }{\text{F}}}_{\text{B}}$?