<p>Two canoeists in identical canoes exert the<br />same effort paddling and hen

Question

<p>Two canoeists in identical canoes exert the<br />same effort paddling and hence maintain the<br />same speed relative to the water. One pad-<br />dles directly upstream (and moves upstream),<br />whereas the other paddles directly down-<br />stream. With downstream as the positive<br />direction, an observer on shore determines the<br />velocities of the two canoes to be &#8722;1.5 m/s<br />and 2.2 m/s, respectively.<br />What is the speed of the water relative to<br />shore?<br />Answer in units of m/s</p>

Explanation / Answer

2.2 = V + Vp where V is speed of water and Vp the paddling speed 1.5 = Vp - V paddling upstream .7 = 2 V subtracting equations V = .35 m/s speed of water

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