Processing Math: Done
Solution 8.6b
From Mechanics
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<math>\sqrt{{{7}^{2}}+{{\left( -6 \right)}^{2}}}=\sqrt{13}=3\textrm{.}6\ \text{m}</math> | <math>\sqrt{{{7}^{2}}+{{\left( -6 \right)}^{2}}}=\sqrt{13}=3\textrm{.}6\ \text{m}</math> | ||
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+ | In the second part the boat travel with constant velocity <math>6\mathbf{i}-8\mathbf{j}</math> | ||
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Thus during the first part the boat has travelled a distance 3.6 m. | Thus during the first part the boat has travelled a distance 3.6 m. |
Revision as of 19:57, 14 April 2010
Here we use
in the first part.
According to the text
We assume the starting point is the origin so that
At
10=35i−30j=(7i−6j)
5
The distance is the magnitude of this vector
72+
−6
2=
13=3.6 m
In the second part the boat travel with constant velocity
Thus during the first part the boat has travelled a distance 3.6 m.