A-LevelPhysicsDeformation of solidsMay/June 2017Paper 1 Q191 Mark
A cable on a suspension bridge supports a weight of 19.3 × 10⁵ N. This weight causes the cable to stretch by 47 mm. A lorry crossing the bridge then increases the force on the cable to 23.3 × 10⁵ N. The force-extension graph for the cable is shown. [Figure shows a force/N versus extension/mm graph. It is a straight line passing through (0,0), (47 mm, 19.3 x 10⁵ N) and (57 mm, 23.3 x 10⁵ N).] What is the increase in strain energy in the cable when the lorry is crossing the bridge?
A21 kJ
B23 kJ
C45 kJ
D66 kJ
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The correct answer is A. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
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