A vertical accelerometer for measuring Figure P13.17 accelerations on a roller coaster can be constructed using a piece of clear plastic pipe, a cork, a rubber band, and a metal bob (Figure P13.17). Where the bob hangs down normally is where you make a mark for an acceleration of \(g\). Without accelerating the pipe, explain how you can calibrate the accelerometer as you assemble it for accelerations of 2 g, 3 g, and so on. (Extra bobs are available.)

Data from Figure P13.17