A police car is traveling at a speed vc to the right. A truck is traveling at a

Question

A police car is traveling at a speed vc to the right. A truck is traveling at a speed vt to the left. When the police car is stationary its siren's has a wavelength of 0.33m and a frequency of fc = 1000 Hz.

The speed of the observer in the truck and the speed of the source, the police car are shown in the figure below.

Car   --->          <---- Truck

20m/s                      50 m/s

What wavelength does a person who is standing (vp = 0) between the truck and the police car detect from the sound of the police car's siren? Answer in (m).

What is the frequency ft heard by an observer on the moving truck? Answer in Hz

Explanation / Answer

Doppler effect:
f = Fo

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.