A second identical block, with twice the mass and twice the surface area as the

A second identical block, with twice the mass and twice the surface area as the original block is placed on the same horizontal board with the original block. One end of the level board is now slowly raised. Which block, if any, is the first to slip and begin to slide down the board? Justify your answer. Equations may be part of your reasoning, but equations alone are not sufficient justification.