A-LevelPhysicsDeformation of solidsMay/June 2015Paper 1 Q231 Mark
The diagram represents a steel tube with wall thickness w which is small in comparison with the diameter of the tube. [Figure showing a tube under tension T, with wall thickness w.] The tube is under tension, caused by a force T, parallel to the axis of the tube. To reduce the stress in the material of the tube, it is proposed to thicken the wall. The tube diameter and the tension being constant, which wall thickness gives half the stress?
Aw/2
B√2 w
C2w
D4w
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The correct answer is C. This question tests the candidate's understanding of deformation of solids within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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