Physics (AS & A Level) · Oct / Nov 2023 · Paper 21 · Question 5

A train travels at a constant high speed along a straight horizontal track towards an observer standing adjacent to the track, as shown in Fig. 5.1. train track observer Fig. 5.1 The train sounds its horn continuously as it approaches the observer, from time t = 0 until it is well past the observer at time t = t2. The train passes the observer at time t = t1. The horn emits a sound wave of constant frequency fS.

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