In this week's WSJ column, I wrote about how the engineered weaknesses in chocolate bars (the grooves) help break it, & now I have an inbox of cross people telling me they break chocolate by bending towards the groove (pushing down directly on the groove), rather than pushing on the side that doesn’t have a groove. I spent a lot of time drawing diagrams of cracks & fracture zones & it's never occurred to me to push on the groove. How do you do this?
@helenczerski I place fingers as a pivot just one side of the groove on front and then apply force from behind at the end on the lever that is the chocolate bar with thumb. One handed break.
I never apply force at the groove in any direction. Well, I guess I do in an action/reaction sense, but that's not the intention.
