Folks, See attached. I wish to calculate the tilt stiffness as a function of some linear stiffness. My attempt is on the RHS of FBD and there is somebody elses attempt on the LHS. I am not sure if it is right. I have 2 queries 1) My attempt on the RHS I wrote the expression of f in terms of linear stiffness (data of which I have lets say 100N/mm). How do I get the actual force? Ie, I am not sure with moment arm to multiply this stiffness value by? 2) How to rit the expression as a function of the angle? Thanks Note I have posted this in https://www.physicsforums.com/showthread.php?t=553883. which I belive is the correct place.