See-Saw. A 4.00-m see-saw of mass 60.0 kg is pivoted at the center. A 12.0-kg boy...

See-Saw. A 4.00-m see-saw of mass 60.0 kg is pivoted at the center. A 12.0-kg boy sits on the left side of the plank, such that his center of gravity is exactly on the edge. His friend sits on the right side of the plank, with her center of gravity 15.0 cm (0.150m) from the edge. At this configuration, the system is in static equilibrium.

(a) What are the magnitudes of their moment arms about the point of support?

(b) What is the mass of the girl?

(c) How much weight is being applied by the point of support?

Expert Solution

genius_generous answered 2 years ago

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