There is a precise article in the European Physics Journal by S. Gandhi and C. Efthimiou about the uphill roller. The reference is: "The Ascending double cone: a closer look at a familiar demonstration", volume 26 in 2005, pages 681-694. The authors have looked at several details (some of which I do not understand since I am still in high school).

## Defying gravity: The uphill roller

There is a precise article in the European Physics Journal by S. Gandhi and C. Efthimiou about the uphill roller. The reference is: "The Ascending double cone: a closer look at a familiar demonstration", volume 26 in 2005, pages 681-694. The authors have looked at several details (some of which I do not understand since I am still in high school).