Explain the concept of deforming force with the help of examples.

1. When a force (within specific limit) is applied to a solid (which is not free to move), the size or shape or both change due to changes in the relative positions of molecules. Such a force is called deforming force.

2. The larger the deforming force on a body, the larger is its deformation.

3. Deformation could be in the form of change in length of a wire, change in volume of an object or change in shape of a body.

4. Examples:

• When a deforming force such as stretching, is applied to a rubber band, it gets deformed (elongated) but when the force is removed, it regains its original length.
• When a similar force is applied to a dough or a clay, it also gets deformed but it does not regain its original shape and size after removal of the deforming force.