1. The problem statement, all variables and given/known data imagine a thin length of wood supported by two supports, one at either end. One support dissapears and the other turns into a pivot (as gravity acts on the wood). Show that the load supported by the pivot is Mg/4. 3. The attempt at a solution i dont know where to start due to my confusion on forces with rotation. i know the plank is acted on by gravity at its CM, and its moment of inertia about its CM = I=1/12*M*l^2. I know there is a reacton force at the Pivot, and this is the force i need to calculate, but i dont know what to consider first, a nudge in the right direction would be helpful!