Yes,unbalaced force may stop or change the direction of motion or accelarate the object.
Yes.
Motion requires a force acting upon an object. When the object changes so does motion.
Balanced forces do not change its motion (no acceleration). Unbalanced forces changes the motion of the object (acceleration).
Yes. As long as the forces are equal and opposite the object will not change its motion.
Balanced forces do not change its motion (no acceleration). Unbalanced forces changes the motion of the object (acceleration).
The result is acceleration of the object ... its speed of motion, or direction of motion, or both, change.
The result is acceleration of the object ... its speed of motion, or direction of motion, or both, change.
If the group of forces acting on an object is unbalanced, the object's motion always changes. The change is called "acceleration".
Not exactly. 'Motion' or 'change of motion' are not force. But the only way to change an object's motion is to cause the group of forces on it to be unbalanced. If the object's motion is changing, then you can be sure that the group of forces acting on it is unbalanced.
A force acting on the body, along its line of motion.
You mean a force I guess. A force acting on an object will make it accelerate or decelerate, and if it is acting at an angle to the existing line of motion will make it change direction.
An object's motion can't change unless an external force is acting upon it. This is Newton's First Law of Motion.