Question

Question 18 according to newton's second law of motion, the force acting on an object varies directly with the object's acceleration. suppose that a force of 18 n results in an acceleration of 6 /ms2 . if the object's acceleration becomes 9 /ms2 , what is the force?

Answer 1

Solve for "x"
X=force
18/6=x/9
cross multiply 
162=6x
x=27
Hope this helps