AS PHYSICS Paper 2

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This question is about the determination of the Young modulus of the metal of a wire. In an experiment, two vertical wires P and Q are suspended from a fixed support. The fixed part of a vernier sc... ale is attached to P and the moving part of the scale is attached to Q. The divisions on the fixed part of the scale are in mm. An empty mass hanger is attached to Q and the scale is set to zero. A load is added to the mass hanger so that the extension of Q can be measured as shown in Figure 1. PMT 3 *03* Turn over ► M/IB/Jun16/7407/2 Do not write outside the box 0 1 . 1 The reading on the vernier scale can be used to determine ∆l, the extension of Q. Determine ∆l using Figure 1. [1 mark] ∆l = ____________________ mm 0 1 . 2 Figure 2 shows how ∆l varies with m, the mass added to the hanger. Determine the mass added to the hanger shown in Figure 1. [1 mark] mass = __________ [Show More]

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