Question

An unbalanced force of 25 N, E, is applied to a 12-kg mass. What is the acceleration given to the mass?

Answer 1

Newton's second law states: $F=m*a$

F stands for force
m stands for mass
a stands for acceleration

Get a alone.

$\frac{F}{m}=a$ or $a=\frac{F}{m}$

Plug in the values you have.

$a=\frac{25N}{12kg}$

This gives:

$a = 2.5\frac{m}{s^2}E$