- #1
wallace13
- 31
- 0
The security alarm on a parked car goes off and produces a frequency of 952 Hz. The speed of sound is 343 m/s. As you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 97 Hz. At what speed are you driving?
F=Fo [(Vsound- Vobserver)/(Vsound-Vsource)]
(952-97)=855
855= 952 [(343-V)/(343-0)]
V= 34.9485 m/s
F=Fo [(Vsound- Vobserver)/(Vsound-Vsource)]
(952-97)=855
855= 952 [(343-V)/(343-0)]
V= 34.9485 m/s