Physics (AS & A Level) · May / June 2020 · Paper 52 · Question 1

A student investigates stationary waves with an elastic cord of circular cross-section attached to a load, as shown in Fig. 1.1. vibrator load cord pulley L Fig. 1.1 When the frequency of the vibrator is f, the cord vibrates with the stationary wave pattern shown. The student investigates how f varies with the cross-sectional area A of the cord. It is suggested that the relationship between f and A is f L kA M 2 1 = where L is the distance between the two nodes, M is the mass of the load and k is a constant. Design a laboratory experiment to test the relationship between f and A. Explain how your results could be used to determine a value for k. 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.