Discuss the below:
The beat detected on a moving platform
Q1: 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.
Q2: 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)