1.hold one end of a meter stick down firmly on a table so that 20 centimeters of the meter stick extends past the edge of the table. pluck the end of the meter stick that extends past the table to produce a vibration and a sound as shown. observe the vibration and sound of the meter stick.
2: do the same thing but at 40 centimeters this time. observe the vibration and sound.
3: this time at 60 centimeters. observe the vibration and sound.