Understanding Tensile Strain

Try these questions

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

1. 1. Tensile strain has no units. What is the reason for this?

   • A. It is a force divided by an area, and the units cancel
   • B. It is a ratio of two lengths, so the units cancel
   • C. It is too small to be measured in SI units
   • D. It is measured in percentages only

2. 2. A steel wire of original length 2.5 m stretches by 5 mm when a load is hung on it. Calculate the tensile strain in the wire (give the answer as a decimal with no units).

   Type your answer in the lesson.

3. 3. Two nylon fishing lines each stretch by exactly 5 mm. Line A has an original length of 1.0 m and Line B has an original length of 10.0 m. Which statement is correct?

   • A. Both lines have the same strain because the extension is the same
   • B. Line B has the greater strain because it is longer
   • C. Line A has ten times the strain of Line B
   • D. Line A has one tenth of the strain of Line B

4. 4. What one-word term describes a quantity, such as strain, that is a pure ratio and has no units?

   Type your answer in the lesson.

5. 5. A copper wire of original length 4.0 m has a tensile strain of 0.0005 when loaded. Calculate its extension in millimetres.

   Type your answer (in mm) in the lesson.

More in Mechanical Properties of Materials

• ▸Environmental and Historical Applications of Pressure
• ▸Mechanical Properties of Materials
• ▸Elasticity and Hooke's Law
• ▸Understanding Tensile Stress
• ▸Modulus of Elasticity and Young's Modulus
• ▸Stress Strain Curves and Material Failure
• ▸Industrial Applications of Material Properties
• ▸Practical Material Testing

See every Grade 10 Physics lesson →