- #71
Fantasist
- 177
- 4
A.T. said:This seems to be the root of the confusion:
The force of constraint does no net work, so the total KE (linear + angular) doesn't change.
But the force of constraint can do negative linear work, and the same amount of positive angular work, so linear KE is converted to angular KE.
Still, you have the problem to explain where the linear force parallel to the rail should be coming from. All forces of constraint here act only perpendicular to the rail.