What will be net force be if net forces are unbalanced?

If the forces on an object are balanced, the net force is zero. If the forces are unbalanced forces, the effects don't cancel each other. Any time the forces acting on an object are unbalanced, the net force is not zero, and the motion of the object changes.

Explanation:

We can use the following kinematics equations to solve this problem:

.

Using the first one to solve for acceleration:

.

Now we can use the second equation to solve for the distance travelled by the airplane:

(three significant figures).