Airtrack: Long track with two gliders coupled by a spring hoop.
1N20.25 • A+35+35
AirTrack: Masses coupled with circular Spring. Two Air Track gliders are coupled with a weak spring consisting of a hoop of clockspring. Gliders are drawn apart so that the clockspring hoop is extended to about 45 cm. Gliders are then released. The sum of their momenta remains zero.
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