Balanced Forces
Forces only ever occur in pairs and can be either balanced or unbalanced. Balanced forces are two forces acting in opposite directions on an object, and equal in size.
Anytime there is a balanced force on an abject, the object stays still or continues to move at the same speed and in the same direction. An object is only said to be acted on by an unbalanced force when there is an individual force that is not being balanced by a second force of equal magnitude and in the opposite direction of the first force.
This can be seen and demonstrates by having an object, and one person pushing it towards the other on each side. This is seen when you push something, but there is a second force equal in magnitude trying to stop you
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