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7. A 60 kg mother and her 25 kg child sit on the ends of a 3m, 80 kg see-saw. The see-saw itself is
symmetric, so that its center of gravity is at its midpoint.
3 m
A) If the mother and child are perfectly balanced on the see saw, how
far from the child is the fulcrum pushing upwards on the see-saw?
B) What force does the fulcrum push up with?
aut
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