do not cause a change in motion. When balanced forces
act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite force
. Neither you nor the wall will move. Forces
that cause a change in the motion of an object are unbalanced forces
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If two individual forces
are of equal magnitude and opposite direction, then the forces
are said to be balanced. An object is said to be acted upon by an unbalanced force
only when there is an individual force
that is not being balanced by a force
of equal magnitude and in the opposite direction.
When two forces
acting on an object are not equal in size, we say that they are unbalanced forces
. If the forces
on an object are unbalanced
this is what happens: an object that is not moving starts to move. an object that is moving changes speed or direction.