The horn on a commuter train emits sound with a frequency of 342.5 hz when the train is at rest. the train sounds its horn as it passes a passenger platform at a constant speed of 41 m/s. what overall change in frequency is detected by a person on the platform as the train moves from approaching to receding? remember that change of frequency means the final frequency minus the initial frequency. be sure to include the correct sign on the answer. (take the speed of sound to be 345 m/s.)

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.