0 \, m$. The fulcrum is located at a distance of $d_f = 2.5 \, m$ from one end. The mass of the seesaw is $m_s = 20 \, kg$. The mass of the child is $m_c = 36 \, kg$. The child sits on the long end, which is $L - d_f = 4.0 \, m - 2.5 \, m = 1.5 \, m$ from the
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