STANDARD Physics Stress and Strain MCQ Question
A steel rod of length 1 m and radius 10 mm is stretched by a force 100 kN along its length. The stress produced in the rod is (Y_steel = 2 × 10¹¹ N m⁻²)
3.18 × 10⁶ N m⁻²
3.18 × 10⁷ N m⁻²
3.18 × 10⁸ N m⁻²
3.18 × 10⁹ N m⁻²
Correct Answer
Detailed Explanation
The stress is calculated using the formula Stress = Force/Area. With a radius of 10 mm, the area is π(10⁻²)² m². The stress produced is 3.18 × 10⁸ N m⁻².
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