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A river is 20 m wide; a 1 m/sec current flows downstream. Two swimmers, A and B, arrange a race. A is to swim to a point 20 m downstream and back while B swims straight across the river and back. Each can swim at 2 mlsec in still water. (a) In what direction should B head in order to swim straight across? Illustrate with a sketch. (See the hint for the preceding problem.) (b) Who wins the race, and by how much time?

A river is 20 m wide; a 1 m/sec current flows downstream. Two swimmers, A and B, arrange a race. A is to swim to a point 20 m downstream and back while B swims straight across the river and back. Each can swim at 2 mlsec in still water. (a) In what direction should B head in order to swim straight across? Illustrate with a sketch. (See the hint for the preceding problem.) (b) Who wins the race, and by how much time?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A river is 20 m wide; a 1 m/sec current flows downstream. Two swimmers,
A and B, arrange a race. A is to swim to a point 20 m downstream and back while
B swims straight across the river and back. Each can swim at 2 mlsec in still water.
(a) In what direction should B head in order to swim straight across? Illustrate
with a sketch. (See the hint for the preceding problem.)
(b) Who wins the race, and by how much time?

1.4. A river is 20 m wide; a 1 m/sec current flows downstream. Two swimmers, A and B, arrange a race. A is to swim to a point 20 m downstream and back while B swims straight across the river and back. Each can swim at 2 m/sec in still water. (a) In what direction should B head in order to swim straight across? Illustrate with a sketch. (See the hint for the preceding problem.) (b) Who wins the race, and by how much time?
Transcribed Image Text:1.4. A river is 20 m wide; a 1 m/sec current flows downstream. Two swimmers, A and B, arrange a race. A is to swim to a point 20 m downstream and back while B swims straight across the river and back. Each can swim at 2 m/sec in still water. (a) In what direction should B head in order to swim straight across? Illustrate with a sketch. (See the hint for the preceding problem.) (b) Who wins the race, and by how much time?
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