A police cruiser and an ambulance travel side-by-side along a straight road

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

A police cruiser and an ambulance travel side-by-side along a straight road, each moving due east at

28\,\text{m}\,\text{s}^{-1}

. The ambulance’s siren emits a steady tone of

750\,\text{Hz}

. Describe what the police officer hears in comparison with the siren’s emitted frequency and briefly explain the reason.