Hi everyone, 1. The problem statement, all variables and given/known data In the picture in attachment you can see 2 objects: "1" (it would be a door keeper) is able to move in direction "Y", "2" (it would be a lock latchbolt) is able to rotate around its axis. The 2 objects are in contact with each other. On the object "1" we have a constant applied load of 10 N. The question is: how much is the required torque to rotate the object "2" in the both directions with/without considering friction (coefficient of friction = 0,25)? At this moment I wouldn’t consider neither the object masses nor the gravity. 2. Relevant equations - 3. The attempt at a solution - Please post here below if you need any clarification! Thanx in advance!