Question

If a cylinder is stretched by two equal forces applied normal to its cross-section, then the restoring force per unit area is called

• A. tensile stress
• B. tangential stress
• C. shearing stress
• D. compressive stress
• E. transvers stress

Hint:

Stretch \(\to\) Tensile.
Squeeze \(\to\) Compressive.
Slide/Twist \(\to\) Shearing.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Stress is defined as the restoring force per unit area. Different types of stress occur based on the direction and effect of the applied forces.

Step 3: Detailed Explanation:
- When the applied forces act normal (perpendicular) to the cross-section and tend to increase the length of the body, the internal restoring force per unit area is called tensile stress.
- If the forces tend to decrease the length, it is called compressive stress.
- If the forces act parallel to the cross-sectional surface, it is called tangential or shearing stress.
Since the question mentions the cylinder is being "stretched" by forces normal to the surface, it is tensile stress.

Step 4: Final Answer:
The restoring force per unit area is tensile stress.