A second object that starts later Problem set A Answers

1. (a) \(\mathbf{r}_2 = \begin{pmatrix} 7(t - 0.4) \\ 9(t - 0.4) - 4.9(t - 0.4)^2 \end{pmatrix}\)
2. (b) \(\mathbf{v}_2 = \begin{pmatrix} 7 \\ 9 - 9.8(t - 0.4) \end{pmatrix}\)

1. (a) \(\mathbf{r}_2 = \begin{pmatrix} (t - 2)^2 \\ 3(t - 2) \end{pmatrix}\)
2. (b) \(\begin{pmatrix} 9 \\ 9 \end{pmatrix}\) m

5.80 m

13.5 m

1. (a) \(\mathbf{r}_2 = \begin{pmatrix} 3(t - 1.5) \\ 16(t - 1.5) - 4.9(t - 1.5)^2 \end{pmatrix}\)
2. (b) 6.48 m

1. (a) t = 1.93 s
2. (b) 4.80 m