PIANOS

SIMPLE MACHINES IN A PIANO

• Lever (The piano keys and the pedals on the bottom.)
• Wheel and axle (On the legs of some pianos to make it easier to move.)
• Screw (Inside the piano to help you tone it.)
• Inclined plain (The music sheet holder.)

FORCES A PIANO USES.

• Contact Force: When the little hammers hit the strings inside the piano.
• Friction: If there are wheels on the bottom.
• ^ ( Specifically rolling friction. But if there is no wheels then it would be -
• sliding friction. )

THE SUM OF THE FORCES AFFECT THE PIANOS MOTION BY:

• The key you press down triggers a little hammer by using a lever.
• Then the little hammer inside the piano strikes
• the string causing the string to vibrate. Which makes a
• musical note.

UNBALANCED FORCES AND BALANCED FORCES

• Contact forces: Unbalanced
• Rolling friction or Sliding friction: Unbalanced

DO THE FORCES ACT IN A DISTANCE

• Contact force: No unless something is thrown at the piano keys/pedals and they are triggered.
• Rolling friction: If the wind or something like that causes it to move than yes. If not no.
• Sliding friction: No. Nothing but a force next to the piano will make it move.