Two forces are applied to a car in an effort to move it$,$ as shown in the figure below. $($Let $F_1=435N$ and $F_2=375N.$ Assume up and to the right are in the positive directions.$)$

$($a$)$ What is the resultant vector of these two forces?

magnitude $$ N

direction $-$ to the right of the forward drection

$($b$)$ If the car has a mass of $3,000kg,$ what atceleration does it have? Ignore fiction.

$\frac{m}{s^2}$