4.6 Exercise 12

Two children pull a third child on a snow saucer sled exerting forces $\textbf{F}_{1}$ and $\textbf{F}_{2}$ as shown from above in the figure. Find the acceleration of the 49.00-kg sled and child system. Note that the direction of the frictional force is unspecified; it will be in the opposite direction of the sum of $\textbf{F}_{1}$ and $\textbf{F}_{2}$.