Question

For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of 18 N acts on a certain object, the acceleration

of the object is 2 m/s to the power of 2. If the acceleration of the object becomes 9 m/s to the power of 2, what is the force?

Answer 1

F=ka

18=k×2*2

k=9/2

F=9/2 ×9*2

F=81