A sound source of frequency moves uniformly along a straight line at a fixed…

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

Problem

A sound source of frequency

320\text{ Hz}

moves uniformly along a straight line at a fixed perpendicular distance from a stationary observer. The source speed is

\dfrac35

of the speed of sound. The frequency received by the observer when the source is closest is

a\times10^2\text{ Hz}

. Find

a