CAPE Physics Unit 1 · 2009 · Paper 1 · Question Q44
The graph below was obtained by applying various forces, F, to a piece of wire and measuring its length, l.
What information can be inferred from the graph?
I. The force constant of the material is 1000\text{ Nm}^{-1}.
II. The ultimate tensile stress of the material is about 35\text{ N}.
III. The strain at X is 3\%.
IV. The material obeyed Hooke's Law up to 30\text{ N}.
- (A)I and IV only
- (B)II and III only
- (C)II and IV only
- (D)III and IV only
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