
University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Transcribed Image Text:Constants
Part A
(Figure 1)A swimmer wants to cross a river, from point
A to point B, as shown in the figure. The distance di
from A to C) is 200 m, the distance d2 (from C to B) is
150 m, and the speed vr of the current in the river is 5
km/hour. Suppose that the swimmer's velocity
relative to the water makes an angle of
θ-45 degrees with the line from A to C, as
indicated in the figure
To swim directly from A to B, what speed us, relative to the water, should the swimmer have?
Express the swimmer's speed numerically, to three significant figures, in kilometers per hour.
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