Resultant Force of an object is not zero
When the resultant force of an object is not zero, there will be an acceleration in the same direction of the force.
This means that;
if the object is at rest, it will accelerate in the direction of the resultant force.
If the object is moving in the same direction as the resultant force, it will accelerate in that direction.
If the object is moving in the opposite direction to the resultant force, it will decelerate.