1. The problem statement, all variables and given/known data A physics student of mass mm = 100 kg gets a summer job painting houses. On his first project, he builds a platform using large pine board with a mass of mb = 60 kg The board has an overall length of L = 8.5 meters and set on two 1.1 meter tall saw horses so that l = 2.25 meters overhangs each side. (a) the student stands over the support at point B, calculate the force exerted by the beam on the support at A__. (b) b)How far from the left end of the beam can the painter stand before the board (and painter) begin to tip over? (c) He now removes one of the supports and places the other one 1/3 of the way from the left edge. Standing at the end of the board, he has his girl friend place paint cans, each of mass mc = 1.75 kg, on the opposite end. How many cans will the girl have to place on the board to provide the best balance? (You may neglect the small length of the board that both the man and the cans occupy. Assume both are points at the ends of the board.) 2. Relevant equations Torque=F(r) F=ma 3. The attempt at a solution I thought part (a) would be mg*r but that didn't work.