A car moving at 108 km h -1 finds another car in front of it going in the same direction at 72 km h -1 . The first car sounds a horn that has a dominant frequency of 800 Hz. What will be the apparent frequency heard by the driver in the front car? Speed of sound in air 330 m s -1 .

Question

Philoid · Accepted Answer

As the cars are moving in the same direction the apparent frequency can be calculate by,

Here

f₀ = 800 Hz

v₀=108 Kmph = 30ms^-1

v_s=72 kmph = 20ms^-1

v=330 ms^-1

Now,

A car moving at 108 km h-1 finds another car in front of it going in the same direction at 72 km h-1. The first car sounds a horn that has a dominant frequency of 800 Hz. What will be the apparent frequency heard by the driver in the front car? Speed of sound in air 330 m s-1.

A car moving at 108 km h^-1 finds another car in front of it going in the same direction at 72 km h^-1. The first car sounds a horn that has a dominant frequency of 800 Hz. What will be the apparent frequency heard by the driver in the front car? Speed of sound in air 330 m s^-1.