A force is applied to a 30-kg object, resulting in an acceleration of 15 m/s. What is the force being applied to the object?

The sum of all forces applied to the object = (mass) x (acceleration)The sum of all forces applied to the object = (30) x (15) = 450 newtons, in the direction of the acceleration. 

From Second Newton's Law:F=a*ma=[tex]15 \frac{m}{ s^{2} } [/tex]m=30kgF=[tex]15 \frac{m}{ s^{2} } [/tex]*30kg=450N