Hi pf. I have a question about an experiment. If you lie a ruler horizontally across two supports (one near each end) and then hang a weight in the middle it will undergo SHM if you pull the mass down. If you move the supports in closer it will oscillate with a higher frequency. I just wanted to know the physics behind this. The only thing I can think of is modelling it as a standing wave. As you move the supports in the effective wavelength of the standing wave is smaller so the frequency must increase to keep the speed of propagation the same. Is that correct?