A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60 o with ground level, but he finds the aeroplane right vertically above his position. If v is th

Question

A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle $60^{o}$ with ground level, but he finds the aeroplane right vertically above his position. If $v$ is the speed of sound, speed of the plane is:

Options:

Answer:

C

Solution:

$\frac{d}{v_{s}} = \frac{d c o s 60^{o}}{v_{a}}$

$v_{a} = \frac{v_{s}}{2} = \frac{v}{2}$

TestHub · Accepted Answer

d v s = d c o s 60 o v a v a = v s 2 = v 2

Physics - Vectors Question with Solution | TestHub

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