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Demonstrate the relationship between acceleration, mass, and center of gravity.
This set includes two acceleration planes: one with two tracks of equal width (19 mm) and the other plane with three tracks, all of different widths (19 mm, 25 mm, and 37 mm).
When two different-sized marbles are used on the equal-sized tracks, they will accelerate at different rates.
But when the three different-sized marbles with radii each as wide as their respective tracks are released simultaneously, they will all accelerate at the same rate.
Both planes are 121 cm x 15 cm, are made of varnished hardwood, and come complete with five steel marbles (one 19 mm diameter, one 37 mm diameter, and three 25 mm diameter) and instructions. Developed by Bruce Yeany.



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