If the resultant of all the forces acting on a body is zero.then it is called balanced forces.if the resultant of all the forces acting on a body is not zero.then it is called unbalanced forces.

**Definition of Balanced Force:**

Balanced forces refer to a situation in which two or more forces acting on an object are equal in magnitude and opposite in direction. When these forces are balanced, they cancel each other out, resulting in no change in the object's motion. As a result, the object remains at rest if initially stationary or continues moving at a constant velocity if initially in motion.

**Explanation of Balanced Force:**

When multiple forces act on an object, their combined effect determines the object's motion. If the forces are balanced, the object experiences no net force, which means the vector sum of all the forces is zero. This occurs when the forces are equal in magnitude and opposite in direction, resulting in a canceling effect.

For example, consider a book placed on a table. The force of gravity pulls the book downward, while an equal and opposite normal force exerted by the table pushes the book upward. These two forces are balanced, and as a result, the book remains stationary.

Another illustration of balanced forces can be observed when two people engage in a tug-of-war and exert equal force in opposite directions. In this case, the rope does not move as the forces cancel each other out.

**Definition of Unbalanced Force:**

Unbalanced forces occur when two or more forces acting on an object are unequal in magnitude or not directly opposite in direction. As a result, there is a net force acting on the object, leading to a change in its motion.

**Explanation of Unbalanced Force:**

When unbalanced forces act on an object, the net force is not zero. This means that there is an overall force in a particular direction, causing the object to accelerate or decelerate. The object's motion can change in terms of speed, direction, or both.

For instance, when a person pushes a car with a force greater than the opposing frictional force, the car accelerates in the direction of the applied force. The net force is determined by subtracting the frictional force from the applied force, resulting in a nonzero net force.

Similarly, if an object is in motion and experiences an unbalanced force in the opposite direction, the object will decelerate. This can be observed when a moving car applies the brakes, resulting in a net force opposing the car's motion.

In summary, balanced forces lead to no change in an object's motion, as the forces cancel each other out. Conversely, unbalanced forces cause a change in motion, either in terms of speed, direction, or both, as there is a nonzero net force acting on the object.