NYU Physics Demos

Center of Mass: Uphill Rolling

Topics: Mechanics - Center of Mass

Equipment: Wooden track/ramp, “double cone” wooden roller.

Setup: Place the track on a leveled surface. Place the roller on the track, at the lower end. Seeming to defy gravity and logic, the roller will roll up the ramp.

The roller is rolling up the ramp, but at the same time, the roller is rolling down on its own edges. The conic shape makes this possible. The roller would roll if the slope of the ramp was negative, positive, or had no slope at all. What matters is how the track gets wider- the roller will roll from the pointed end of the track to the wide end of the track, regardless of the incline (to a degree).

Location: Shelf B-d4


Keywords: Defy, Gravity

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