Calibration Lesson: Intelino Smart Train and Voyager
by Professor Rich Born
Figure 1 - Intelino app with calibration numbers on the accelerator
Suggested Experiment Setup
Figure 2 - Suggested experiment setup
Figure 3 - Magnetic field data from the PocketLab app.
Figure 4 shows the calibration graph obtained by the author of this lesson, with the straight line of best fit going through the origin (where the speed is clearly zero). Students can "eye" a straight line of best fit through their data points. The linear relationship between speed and calibration number shows that it is a reasonable approximation to assume that the speed in cm/s is about ten times the calibration number. For example, a calibration number of 4 gives a speed of 40 cm/s, a calibration number of 6 gives a speed of 60 c/s, and so on. The pdf file accompanying this lesson contains and "empty" graph on which students can plot their data points.
Figure 4 - A typical calibration graph for this experiment