Chapter 15, Problem 80A

To determine

To complete: The statement of the given problem.

Explanation of Solution

Introduction:

The Doppler’s effect equation is given by:

  $f_d=f_s\left(\frac{v-v_d}{v-v_s}\right)$

Where $f_s$ is frequency of the source, $v$ is the speed of sound in air, $v_d$ is velocity of the detector and $v_s$ is velocity of the source.

The given problem can be completed to solve using a Doppler’s effect equation as follows:

A car’s horn is stuck and is emitting a pitch of $\text{500 Hz}$ . The car is moving with a velocity of $30\text{ m/s}$ towards a man sitting on a bench. What frequency will the man hear?

Conclusion:

The frequency heard by the man can be calculated using Doppler’s effect equation.