2 years ago

8. A Ferris wheel with diameter 18 m and rotates with constant speed of 3.8 ms.

Physics

1 answer:

icang [17]2 years ago

6 0

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70.07 Hz

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Since the sound is moving away from the observer then

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With $f_o$ of 76 then taking speed in air as 343 m/s we have

$76 = f_s\times\frac {(343-vs)}{343}$

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Similarly, with $f_o$ of 65 we have

$65 = f_s\times\frac {(343+vs)}{343}\\f_s=\frac {343\times 65}{343+v_s}$

Now

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v_s=27.76 m/s

Substituting the above into any of the first two equations then we obtain

$f_s=70.07 Hz$

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