Question

As the train in the image moves to the right how does the train horn sound to person a?

Answer 1

Step-by-step explanation:

Person A's velocity relative to the train is 0. Therefore, the pitch of the horn will not change.

Answer 2

D. The pitch does not change.

Step-by-step explanation:

When the source of sound moves away, the pitch drops. and when the source of sound approaches the pitch rises. This is called'Doppler effect'.

Here the person a and the sound horn are both in the same vehicle. Which means their relative velocity is zero. So the horn is neither approaching nor receding the person A

If the source is approaching

`f_(new)= (v_(sound) )/(v_(sound) -v_(source) )f_(original)`

If the source is receding

`f_(new)= (v_(sound) )/(v_(sound) +v_(source) )f_(original)`

Hence the right answer is option D. The pitch does not change