Answer :

luana
From Second Newton's Law:

F=a*m
a=[tex]15 \frac{m}{ s^{2} } [/tex]
m=30kg

F=[tex]15 \frac{m}{ s^{2} } [/tex]*30kg=450N
AL2006
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.