Question

What is difference between balanced and unbalanced force?

Answer 1

i) Balanced force means the sum of all the forces(or net force) acting on a body is zero.
Unbalanced force means the sum of all the forces acting on a body is non-zero.

ii) Balanced force doesn't affect the state of motion of object. 
Unbalanced force changes the state of motion.

Answer 2

"Balanced Force:

• They don’t bring any change to the object.
• They are equal in magnitude.
• The result is always zero.
• The object remains stationary.
• They do not need any external force to balance, because it is already balanced.  
• Example: book kept on a table

Unbalanced Force:      

• They change the position of the object.        
• They are not equal in magnitude.
• The result is always greater than zero.
• The object doesn’t remain stationary.
• They need an external force to balance.
• Example: book pushed from the table"