On a certain problem in mechanics, obvious enough, but with a most difficult solution
The main problem is: If whatever body BCD, lying on a very polished horizontal plane at point B, fixed with the help of string BA in point A, is restrained, and whatever motion is impressed on it, to investigate the motion by which this body will successively advance.
Original Source Citation
Acta Academiae Scientiarum Imperialis Petropolitanae, Volume 1778: II, pp. 150-161.
Opera Omnia Citation
Series 2, Volume 7, pp.73-83.