9) You are crossing a river on a ferry. Assume there is no current in the river (that is, the water is at rest with respect
to the shore). The ferry is traveling at a constant velocity of 7.0 m/s north with respect to the shore, while you are
walking at a constant velocity of 3.0 m/s south relative to the ferry. (A) What is your velocity relative to the
shore? (B) Assume now that there is a current of 2.0 m/s directed south in the river, and that the ferry's velocity
of 7.0 m/s north is relative to the water. What is the ferry's velocity relative to the shore? What is your velocity
relative to the shore?
