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                                  UNIT 1

                 BALANCED AND UNBALANCED FORCES

See the portrayal of a tug of war competition. Why doesn't the rope move to either side in fig 1. 1?

Isn't it due to the balanced force acting on the rope?

          Fig 1.1 and fig 1.1 a

You know the various effects of force on an object.  Write them down. 

   * to move an object. 

   * 

What is the type of force applied on the rope in fig 1. 1 a ? Balanced or unbalanced?

Observe the following activities:

Formulate the definition of balanced and unbalanced force??

BALANCED FORCE : When two or more forces act on a body in opposite directions,  and if the resultant force is zero,  then the forces are balanced. In this case the body does not undergo any change in position.

UNBALANCED FORCE : When two or more forces act on a body in opposite directions, and if the resultant force is not equal to zero, the forces are said to be unbalanced. In this case the body undergoes change of position. 

Significant learning outcomes 

** Distinguish between balnced and unbalanced forces, and their effects through different activities.

                             LET US ASSESS

1. What are the balanced forces acting on a book at rest on a table?

2. What will be the result when lifts a cement bag from the ground? Why,?