Part 1
Case12au12=x1+u1tCase2x2=u2t+2au222au22=x2−u2tSo,u22u12=x2−u2tx1−u1tu12x2−u2u12t=x1u22−u1u22tt=u12u2−u1u22x1u22−x2u12t=22.352∗13.411(22.352−13.41156.693∗13.4112−24.384∗22.3522t=0.741s
Part 2
a=2(x1−u1t)u12a=2(56.693−22.352∗0.741)22.3522a=6.22m/s2
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