Physics (AS & A Level) · Oct / Nov 2020 · Paper 53 · Question 1

A student investigates a spring of width w made from a metal wire, as shown in Fig. 1.1. w metal wire Fig. 1.1 The student constructs several springs, each made from a metal wire of different cross-sectional area A. The student investigates how the extension x of each spring varies with A when a load of mass m is applied. It is suggested that the relationship between x and A is x = mgw3N An γρ where g is the acceleration of free fall, ρ is the density of the metal, N is the number of turns of wire in the spring and γ and n are constants. Design a laboratory experiment to test the relationship between x and A. Explain how your results could be used to determine values for γ and n. You should draw a diagram, on page 3, showing the arrangement of your equipment. In your account you should pay particular attention to: ● the procedure to be followed ● the measurements to be taken ● the control of variables ● the analysis of the data ● any safety precautions to be taken. 3 Diagram 4 [15]

Read automatically from the paper; the printed page above is exact.