Question

A stationary police car emits a sound of frequency 1230 Hz that bounces off of a car on the highway and returns with a frequency of 1270 Hz . The police car is right next to the highway, so the moving car is traveling directly toward or away from it.

a)How fast was the moving car going? (in m/s)

b)What frequency would the police car have received if it had been traveling toward the other car at 23.0 m/s ? (in Hz)

Answer 1

As we know that;

= 1230*(344+v)/344

Then,