Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 3 - Kinematics in Two Dimensions; Vectors - Problems: 49


23s; 23m

Work Step by Step

The lifeguard is carried downstream at the same rate as the child. We only need to deal with the horizontal motion to find the time. t = (45 m)(2.0 m/s) = 22.5 s. The lifeguard will reach the child in approximately 23 seconds. The river carries both of them downstream a distance of (1.0 m/s)(22.5 s) = 22.5 m. The lifeguard will intercept the child at approximately 23 meters downstream.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.