Acat named schrödinger walks along a uniform plank that is 4.00 m long and has a mass of 7.00 kg. the plank is supported by two sawhorses, one that is 0.44 m from the left end of the plank, and the other that is 1.50 m from the right end. when the cat reaches the very right end of the plank, the plank starts to tip. what is schrodinger’s mass? note: just when the plank begins to tip, the normal force on the plank from the sawhorse on the left will go to zero.