A swimmer heads directly across a river, swimming at2.80 m/s relative to still w
ID: 1679853 • Letter: A
Question
A swimmer heads directly across a river, swimming at2.80 m/s relative to still water. He arrives at a point 49.0 mdownstream from the point directly across the river, which is 73.0m wide. Find: a. What is the speed of the rivercurrent? b. What is theswimmer's speed relative to the shore? c. In what directionshould the swimmer head so as to arrive at the point directlyopposite his starting point? Express your answer in terms of theangle with respect to a line drawn directly across theriver. Find: a. What is the speed of the rivercurrent? b. What is theswimmer's speed relative to the shore? c. In what directionshould the swimmer head so as to arrive at the point directlyopposite his starting point? Express your answer in terms of theangle with respect to a line drawn directly across theriver.Explanation / Answer
(b) the swimmer's speed relative to theshore, v = (2.82 +1.882)1/2 m/s =3.373 m/s
(c) Set“downstream” components = 0