BRAINCAKEExam Style Question - 1
Question
A steel wire of original length 2.00 m and diameter 0.50 mm hangs vertically. When a load of 40 N is added, the wire extends by 2.0 mm. The wire stays within its limit of proportionality.
(a) Calculate the cross-sectional area of the wire. (2 marks)
(b) Calculate the stress in the wire. (1 mark)
(c) Calculate the strain in the wire. (1 mark)
(d) Calculate the Young modulus of the steel. (1 mark)
(e) Explain why the diameter should be measured at several points along the wire. (1 mark)
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- stress
- The force applied to a material per unit cross-sectional area, measured in pascals.
- strain
- The ratio of the extension of a material to its original length; it has no units.
- young modulus
- The ratio of stress to strain for a material undergoing elastic deformation, a measure of its stiffness.
More in Solid Materials
- The Young Modulus
- Stress-Strain Graph Metal Wire
- Experiment to Measure the Young Modulus
- Properties of Materials
- Exam Style Question - 1
- Exam Style Question - 1
- Springs in Series
- Springs in Parallel
All 14 lessons in Solid Materials · All Edexcel AS-level Physics topics