College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 65PE
An athlete crosses a 25-m-wide river by swimming perpendicular to the water current at a speed of 0.5 m/s relative to the water. He reaches the opposite side at a distance 40 m downstream from his starting point. How fast is the water in the river flowing with respect to the ground? What is the speed of the swimmer with respect to a friend at rest on the ground?
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An athlete crosses a 29 m wide river by swimming perpendicular to the water current at a speed of 1.1 m/s relative to the water. He reaches the opposite side at a distance 45 m downstream from his starting point.
w = 29 md = 45 mvs = 1.1 m/s
Part (a) How fast is the water in the river flowing with respect to the ground in m/s?
Part (b) What is the speed of the swimmer with respect to a friend at rest on the ground in m/s?
An athlete crosses a 21 m wide river by swimming perpendicular to the water current at a speed of 0.35 m/s relative to the water. He reaches the opposite side at a distance 37 m downstream from his starting point. How fast is the water in the river flowing with respect to the ground in m/s?
An athlete crosses a 28 meters wide river by swimming perpendicular to the water current at a speed of 1.1 m/s relative to the water. He reaches the opposite side at a distance of 42 meters downstream from his starting point.
w = 28md = 42m
vs = 1.1m/s
How fast is the water in the river flowing with respect to the ground in m/s?
Chapter 3 Solutions
College Physics
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