I consider this physics 
But, given that Newton's Second Law is F=ma and since you are given the mass and force, the acceleration can be easily calculated by isolating variable acceleration (a)
[tex]F=ma[/tex]
[tex]a =  \frac{F}{m} [/tex]
[tex]a=  \frac{12 N}{2 kg} [/tex]
[tex]a = 6  \frac{m}{s} [/tex]