Modulus of Elasticity and Young's Modulus

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. What is the SI unit of Young's modulus?

   • A. Metres per second (m/s)
   • B. Pascal (Pa), equal to N/m^2
   • C. Newton (N)
   • D. It has no unit

2. 2. A steel wire of original length 2.0 m and cross-sectional area 2.0 \times 10^{-6} m^2 carries a tensile force of 100 N. It extends by 0.50 mm. Calculate the Young's modulus of the steel in gigapascals (GPa).

   Type your answer (in GPa) in the lesson.

3. 3. A copper wire has a Young's modulus of 120 GPa. What happens to its Young's modulus if the length of the wire is doubled?

   • A. It doubles
   • B. It halves
   • C. It stays the same
   • D. It becomes four times larger

4. 4. The gradient of the straight-line (elastic) part of a graph of tensile stress against tensile strain gives which quantity? (Name it.)

   Type your answer in the lesson.

5. 5. A steel cable (Y = 200 GPa) and a rubber cable (Y = 0.01 GPa) have the same length and thickness and carry the same load. Which statement is correct?

   • A. Steel stretches more because it is stronger
   • B. Both stretch equally because their dimensions are the same
   • C. Steel stretches more because it is denser
   • D. Rubber stretches more because it has a much lower Young's modulus

More in Mechanical Properties of Materials

• ▸Mechanical Properties of Materials
• ▸Elasticity and Hooke's Law
• ▸Understanding Tensile Stress
• ▸Understanding Tensile Strain
• ▸Stress Strain Curves and Material Failure
• ▸Industrial Applications of Material Properties
• ▸Practical Material Testing
• ▸Concept of Temperature and Temperature Scales

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