(b) [image:3_image177.emf]
(i) The displacement of the main from $A\ $to $E$ is $\mathrm{\Delta}x = x_{2} - x_{1} = 7m - ( - 8m) = + 15m$ directed in the positive $x$-direction
(ii) The displacement of the man from $E$ to $C$ is $\mathrm{\Delta}x = - 3m - (7m) = - 10m$ directed in the negative $x$-direction
(iii) The displacement of the man from $B$ to $D$ is $\mathrm{\Delta}x = 3m - ( - 7m) = + 10m$ directed in the positive $x$-axis