Assignment:
A speaker fixed to a moving platform moves to a wall, emitting a steady sound with a frequency of 250Hz. A person on the platform, right next to the speaker detects the sound waves reflected off the wall, and those emitted by the speaker.
How fast should the platform move, vp, for the person to detect a beat frequency of 4.00Hz? (Take the speed of sound to be 344m/s)
(Solve to three significant figures.)
vp = _______________________________ m/s
Provide complete and step by step solution for the question, use formulas.