Ian: New page: From part b) we have $\mathbf{v}=\left( 2-\frac{t}{5} \right)\mathbf{i}+2\mathbf{j}$ If the boat is travelling north, the $\mathbf{i}$ component of the velocity mu...

Ian — Fri, 08 Oct 2010 18:49:15 GMT

New page: From part b) we have <math>\mathbf{v}=\left( 2-\frac{t}{5} \right)\mathbf{i}+2\mathbf{j}</math> If the boat is travelling north, the <math>\mathbf{i}</math> component of the velocity mu...

New page

From part b) we have

<math>\mathbf{v}=\left( 2-\frac{t}{5} \right)\mathbf{i}+2\mathbf{j}</math>

If the boat is travelling north, the <math>\mathbf{i}</math> component of the velocity must be zero.

<math>\begin{align}
& 2-\frac{t}{5}=0 \\
& t=10\ \text{s} \\
\end{align}</math>

Solution 18.8c - Revision history

Ian: New page: From part b) we have \mathbf{v}=\left( 2-\frac{t}{5} \right)\mathbf{i}+2\mathbf{j} If the boat is travelling north, the \mathbf{i} component of the velocity mu...

Ian: New page: From part b) we have $\mathbf{v}=\left( 2-\frac{t}{5} \right)\mathbf{i}+2\mathbf{j}$ If the boat is travelling north, the $\mathbf{i}$ component of the velocity mu...