I don't know if "toppling" is even a word.:uhh: This is not a homework,just a question. https://www.physicsforums.com/attachment.php?attachmentid=68762&stc=1&d=1397811697 If I apply a force at A,the box will topple and fall.(Probably because of friction) If I apply a force at B,the box will move(Probably because the force overcame the friction) What's causing it? Torque? As the distance increase,the effect of force on friction decreases but why? P.S I am a Grade 10 student.