Everybody loves a slinky HELP! my variables f = frequency v = velocity y = wavelength Due to the equation v = yf what other factors could change 'v'? does the material condition (stretched) have any factors to change speed. These are some answers of the questions I have done. The speed of a pulse reaching to the end is the same speed coming back to the other endThe Amplitude does not effect the speed since it does not have a special part to the equation v = yf "Question I'm on" Does the material condition effect the speed (ex. stretched)"My answer to that, not really sure" The material condition does not effect the speed, because it only effects the amplitude therefore not effecting the speed.Are my responses correct? I experimented my theories on a slinky.