A force is the change of state of an object due to external surroundings. Due to forces, an object will either be in a state of motion or will be resting.
we always need to apply force to make anything to move, to stop or change its direction or change the shape of an object. Like, to change the shape of a Rubber band, to knead the dough, push a trolley, stop a moving car by applying break, etc. But many times even on applying force the object does not move at all. For example- If two person push a heavy table /object from opposite sides or Two team pull the rope with equal force in a tug of war game, we find that the table or rope does not move. When two persons push the heavy table with equal force from opposite directions, their forces get balanced, the net force on the table or rope is zero. Therefore the table or rope does not move at all. When two forces equal in magnitude are applied on an object through push or pull from opposite directions, and the resultant force on the object is zero. such force is called Balanced force. The rope or table moves only when the applied force of both persons is getting unbalanced by applying force either in the same direction or when gone of them applies more force than the other. such force is known as an unbalanced force
Few points on Force:--
Inertia:-- The natural tendency of an object to resist a change in their state of uniform motion or of rest is called inertia.