ACCELERATION TRACK

EQUIPMENT
    Tracks
    2 Stop Clocks
    3 Microswitches
    Metal Ball
    Support Stands




NARRATIVE
         The distance an accelerating body travels is proportional to the square of the time of travel. Set up the track as straight as possible. Attach the microswitches to the track as follows:

                      Place the first switch at the top of the track so that the ball may be released when the tape is pulled. This switch starts the first clock and second clocks.

                      Locate the second switch about 1 m from the first. This switch stops the first clock.

                      Place the third switch 3 m from the second one or about 4 m from the first. This switch stops the second clock. There is a slotted block at the end of the track to catch the ball.

            After being released, the ball takes the same amount of time to go from start to the second switch as it takes to go from the second switch to the third switch. The switches may be slid along the track to achieve this.

            After a run, reset the switches by depressing the buttons which are recessed in the bottom of the switch. Then reset the clocks. After several runs, check the track sections for a tight fit.

            Practice being consistent in the way the trip tape is pulled because the affects the time on the first clock.

            Unplug the clocks if they won't be used for a long time. Their motors run constantly when plugged in.