Try this...I stood inside a bathtub with a club shaft and a flashlight pointing at a straight line (between the tiles) while shaft was laying against the tub's outer edge. Move the shaft back and through with the shaft laying on the bathtub's straight edge. The flashlight remains shining (tracing) the straight line but the shaft with have an in to out motion coming through. I used a bathtub because I did not have a low bench around.
"...Angular Motion on an Inclined Plane." Also 1-L #5, #6, #10, #13, and #18.