A wireless transmitting microphone is mounted on a small platform, which can rol

Question

A wireless transmitting microphone is mounted on a small platform, which can roll down an incline, away from a speaker that is mounted at the top of the incline. The speaker broadcasts a fixed - frequency tone. (a) The platform is positioned in front of the speaker an released from rest. describe how the velocity of the platform changes and why? b) How is the changing velocity related to the acceleration of the platform? (C) DESCRIBE HOW THE FREQUENCY DETECTED BY THE MICROPHONE changes. Explain why the frequency changes as you have described? and find the angle of the incline, assuming that it is frictionless?

Explanation / Answer

The frequency detected by the microphone decreases due to dopplershift. The equation involved is: ' = '[(1-v/c)/(1+v/c)]^(1/2) C = f C = speed of sound f= frequency look up the speed of sound and solve for f.

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