how do piano's work/ make sound?

Answer 1

the keys are one end of a lever (imagine teeter-totter or see-saw) and on the other end is a hammer that hits a string on something that would look like a harp if it weren't lying down inside the case (in the example of the grand piano)

Answer 2

When you push the key (white or black) down, a hammer hits the string (3 strings for each key in the upper two thirds of the piano and 1 each for the lower 3rd) which makes the sound. A bar with felt on it actually lifts off of the strings so the strings will vibrate until you lift your finger off of the key.
If you want more details you'll have to search.

Answer 3

well, i cant play one but from what ive seen...little hammer looking things (that probably have a much dumber and more technical name than little hammer looking things) are made to come down and hit wires or strings of different size and thickness that are tightened to different levels.....and that makes the noise......thats the best i can come up with.kinda like my version of "the mechanics of piano for dummies".......