With reference to Elasticity, define the following terms :
1. Stress
2. Strain

Explanation

### Step-by-Step Text Solution

#### 1. Definition of Stress
Stress is defined as the force applied per unit area of an object. It quantifies the internal resistance of a material to deformation when subjected to an external force. Mathematically, it can be expressed as:

\[ \text{Stress} (\sigma) = \frac{\text{Force} (F)}{\text{Area} (A)} \]
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