Home » Posts tagged 'elasticity'

# Tag Archives: elasticity

### Subscribe to Blog via Email

Join 3,908 other subscribers

## Question Bank in Class XI Physics – Mechanical Properties of Solids

Important Points to remember:

• Deforming forces are external force applied on a body to change its size or shape.
• Restoring force is the internal force developed in a body trying to bring it back to the original configuration when it is acted upon by an external force trying to change its size or shape.
• Elasticity is the property of a body by virtue of which it tries to regain its original configuration when the deforming forces are removed.
• Perfectly elastic body is a body which regains its original configuration completely on removal of deforming forces.
• Plasticity is the property of a body by virtue of which it does not regain its original configuration on removal of deforming forces.
• Perfectly plastic body is a body which does not show any tendency to regain its original configuration on removal of deforming forces
• Stress: The restoring force developed per unit area of a deformed body is called stress.
• Tensile stress: If a deforming force is trying to produce an increase in length, then the restoring force developed per unit area of cross section is called tensile stress
• Compressive Stress: When a deforming force acting normal to a surface tries to produce a change in volume, then the restoring force produced per unit area is called compressive stress.
• Shearing stress: When a tangential force tries to change the shape of a body whose bottom is fixed, then the restoring force developed per unit area is called Shearing stress.
• Strain: The ratio of the change in dimension to the original dimension of a deformed body is called strain
• Linear or longitudinal strain