Consider two thin bars of constant cross-sectional area, each of length 10 cm, with respective mass linear-density functions p(x) = and 6(x) = 0.12 kg m 1 + x (a) Interpret what it means for a bar to have mass linear-density p(x) = bar to have mass linear-density 6(x) = 0.17 kg 771 (b) Find the mass of each bar. 1+x m (c) Explain why rp(a) da represents the total moment of mass for the first bar. (d) Find the center of mass of each bar. and a