Question

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?

Answer 1

From Second Newton's Law:

F=a*m
a=$15 \frac{m}{ s^{2} }$
m=30kg

F=$15 \frac{m}{ s^{2} }$*30kg=450N

Answer 2

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.