A couple of mechanics questions I jsut cant get my head around;
1) A light rod of 50cm lies on a horizontal table. A person holds the end of the rod. The rod is subjected to a couple, of moment 40Nm, causing it to rotate upon the table. What force perpendicular to the rod must the person exert through each hand in order to prevent rotation?
2) A uniform beam AB of mass 10kg and length 4m rests horizontally on two supports, one at A and the other 1m from B. Where must a body of mass 50kg be placed on the beam if it wished to make the reactions at the supports equal?