A fire truck moving at 60 m/s sounds its siren whose frequency is 1320 Hz. A car is moving in the same direction as the ambulance at 30 m/s. What frequency does a person in the car hear (a) as the ambulance approaches the car? (b) After the ambulance passes the car?

A fire truck moving at 60 m/s sounds its siren whose frequency is 1320 Hz. A car is moving in the same direction as the ambulance at 30 m/s. What frequency does a person in the car hear (a) as the ambulance approaches the car? (b) After the ambulance passes the car?

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Question

A fire truck moving at 60 m/s sounds its siren whose frequency is 1320 Hz. A car is moving in the same direction as the ambulance at 30 m/s. What frequency does a person in the car hear

(a) as the ambulance approaches the car?

(b) After the ambulance passes the car?

Expert Solution

GIVEN:

The speed of the fire truck (or) ambulance is given as, $v_{a} = 60 m / s$

The frequency in the siren is given as, $f_{a} = 1320 H z$

The speed of the car is given as, $v_{c} = 30 m / s$

TO DETERMINE:

(a) The frequency person hears in the car as the ambulance approaches the car, $f$

(b) The frequency person hears in the car as the ambulance approaches the car, $f$

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