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Physics Rotational Mechanics Level: High School

Rotational Equilibrium

Three boys are trying to balance on a seesaw , which consists of a fulcrum rock as a pivot at the center , and a very light board L = 3.66 m long , see figure at “click here” . Two boys are already on either end . One has a mass of m1 = 44.0 kg , and the other a mass of m2 = 30.8 kg . How far from the center should the third boy , whose mass is m3 = 26.8 kg . place himself so as to balance the seesaw ?