Physics

Problem

A river flows due east at

1.5\,\text{m}\!/\!\text{s}

. A swimmer can move through still water at

2.0\,\text{m}\!/\!\text{s}

by aiming due north. What is the magnitude of the swimmer’s velocity relative to the shore? a)

3.5\,\text{m}\!/\!\text{s}

2.0\,\text{m}\!/\!\text{s}

2.5\,\text{m}\!/\!\text{s}

2.6\,\text{m}\!/\!\text{s}