a train moving at a speed of 40.0 m/s sounds its whistle, which has a frequency of 500 hz. determine the frequency heard by a stationary observer as the train approaches the observer also find the frequency heard by the stationary observer as the train recedes from the observer.
i need the frequency as the train !

i guess the game developers wanted to give off a more gamey/cartoony feeling without trying to copy fortnite exactly

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.