Post-UTME Physics 2012 Objective — Question 2
Question 2 of 7 from the Post-UTME Screening (Post-UTME) Physics 2012 Objective paper, with the correct answer and a full explanation.
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A load of 5N gives an extension of 0.56cm in a wire which obeys Hook's Law. What is the extension caused by a load of 20N?
- A. 2.14cm
- B. 2.24cmCorrect
- C. 1.12cm
- D. 2.52cm
Explanation
By Hooke's law, extension is proportional to load: 0.56 x (20/5) = 2.24cm.
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