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Differences between balanced and unbalanced forces
Balanced forces will cause no change in the speed of an object.
- Balanced forces acting on an object in opposite directions and equal in strength, as shown in the arrows below, do not cause a change in the speed of a moving object.
- Objects that are not moving will not start moving if acted on by balanced forces.
For example,
In a tug of war, if there is no movement in the rope, the two teams are exerting equal, but opposite forces that are balanced. Again, the resulting force (net force) is zero.
Unbalanced forces are not equal, and they always cause the motion of an object to change the speed and/or direction that it is moving.
- When two unbalanced forces are exerted in opposite directions, their combined force is equal to the difference between the two forces.
- The magnitude and direction of the net force affects the resulting motion. This combined force is exerted in the direction of the larger force.
For example,
- If in a tug of war, one team pulls harder than the other, the resulting action (net force) will be that the rope will change its motion in the direction of the force with the greater strength/magnitude.
- If unbalanced forces are exerted in the same direction, the resulting force (net force) will be the sum of the forces in the direction the forces are applied.
- Unbalanced forces also cause a nonmoving object to change its motion
If there is no net force acting on the object, the motion does not change. If there is a net force acting on an object, the speed of the object will change in the direction of the net force.
Updated on: 10-Oct-2022
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