A box of negligible mass rests at the left end of a 2.00 m, 29.0 kg plank (Eigure 1). The width of the box is 75.0 cm, and sand is to be distributed uniformly throughout it. The center of gravity of the nonuniform plank is 50.0 cm from the right end Figure Sandbox- -75.0 cm A < 1 of 1 Center of gravity of plank 50.0 cm > ▼ Part A What mass of sand should be put into the box so that the plank balances horizontally on a fulcrum placed just below its midpoint? Express your answer with the appropriate units. msand F Submit μA Value Request Answer Units s Review | Constants ?

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