Balanced Force

In this chapter, we will look into how Balanced and Unbalanced Forces vary from each other. But first, to understand Balanced and Unbalanced forces, we need to understand what Force is. Force can be defined as the pull or push applied on an object. This object experiences the force when it interacts with another object. We apply force, or force is applied to us in almost every aspect of our daily life. It is the driving factor behind every phenomenon in the universe.

From the gravitational pull of the sun, which binds the solar system together to the lifting up of a pencil by a child, everything is an example of force.

Force can be of two types:

  • Balanced force
  • Unbalanced force

According to Newton’s First Law – A body at rest or in motion will continue to remain in the unchanged position unless an external force is applied to it.

What is a Balanced Force?

A force where two forces of equal size, act on a body, in opposing directions is known as a Balanced Force. In Balanced Force, a body continues to be in its position i.e. it may be continuously moving with the same speed and in the same direction or it may be still in its position.

Example of Balanced Forces-

Suppose you are pushing a wall and as expected, the wall does not move and neither do you. It means that you and the wall are exerting a balanced force on each other.

Balanced Force
Let us look at the following illustration for better understanding.

Balanced Force

The image displayed above is a game of tug-of-war between two equally matched teams. Neither of the teams is able to pull the opposing team towards itself. This is an example of two balanced forces.

What is an Unbalanced Force?

A force where two forces acting in opposing directions on a body, are not equal in magnitude and in size, is known as an unbalanced force. In an unbalanced force, a body changes its position i.e. we can observe a moving object changing its direction, either increasing the speed or decreasing the speed and a body at rest starts to move and vice versa.

Example of Unbalanced Forces-

Practically anything that moves is a result of the exertion of unbalanced forces on it. If you kick a football and it moves from one place to another, it means that unbalanced forces are acting upon it.

Unbalanced Force
Let us look at the following illustration for better understanding.

Unbalanced Force

The above image shows two people on a seesaw. The person on the right is significantly heavier than the person on the left and the seesaw is effectively tilted towards him. This is an example of two unbalanced forces.

The difference between balanced and unbalanced force

Balanced forces Unbalanced forces
Equal in magnitude. Unequal in magnitude.
Opposite in direction. Can be in any direction but opposite.
Does not cause any change in the state of motion of the object. Causes change in the state of motion of the object.


Practise This Question

lf all the particles of a system lie in a cube, is it necessary that the centre of mass be in the cube?