I think everyone is being rough on this kid. For all we know this is for an Intro to Engineering class and none of the students have taken Statics or a mechanics of material course yet.
Being that this is likely in intro class, I would stick with calculating the largest forces. The lobes are mostly in compression (and account for the shear force from the axle acting on the cam lobe itself). Bending and torsional forces will likely be low comparatively. On the axle you will have large bending and shear forces.
(This post was edited by jowybyo on Aug 17, 2012, 8:39 AM)
Post edited by jowybyo
() on Aug 17, 2012, 8:39 AM