Question

A river has a current of 4 m/s south with respect to the shore. A swimmer is swimming in the river (which is redundant).
a. If the swimmer is swimming 2 m/s north with respect to the water, what is his velocity relative to the shore?
b. If the swimmer is swimming 3 m/s south with respect to the water, what is his velocity relative to the shore?
bobpursley
a) What is 4S+2N?
b) what is 4S+3S?

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