Unbalanced Forces
An unbalanced force is when there is a single force that is not being balanced by a second force a that is of equal magnitude and in the opposite direction, and causes a change in the object's motion.
When balanced forces act on an object at rest, the object will not move.Where as if an unbalanced force acts on an object at rest, it will cause the object to accelerate, as there is no other force of equal strength going opposite to stop it.
This can be seen when something accelerates, and there is no other force there to stop or slow it down, like kicking a football.
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