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Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w. One of these vehicles blows a whistle of frequency f1 . An observer in the other vehicle hears the frequency of the whistle to be f2 . The speed of sound in still air is V. The correct statement(s) is (are) (A) If the wind blows from the observer to the source, f2>f1 . (B) If the wind blows from the source to the observer, f2> f1 . (C) If the wind blows from observer to the source, f2<f1. (D) If the wind blows from the source to the observer f2<f1. .

Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w. One of these vehicles blows a whistle of frequency f1 . An observer in the other vehicle hears the frequency of the whistle to be f2 . The speed of sound in still air is V. The correct statement(s) is (are) (A) If the wind blows from the observer to the source, f2>f1 .
(B) If the wind blows from the source to the observer, f2> f1 .
(C) If the wind blows from observer to the source, f2

Grade:11

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
2 years ago
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