University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 2.78P
A physics teacher performing an outdoor demonstration suddenly falls from rest off a high cliff and simultaneously shouts “Help.” When she has fallen for 3.0 s, she hears the echo of her shout from the valley floor below. The speed of sound is 340 m/s. (a) How tall is the cliff? (b) If we ignore air resistance, how fast will she be moving just before she hits the ground? (Her actual speed will be less than this, due to air resistance.)
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A ball is dropped from an ocean cliff. The sound of the ball splashing into the ocean is heard 4.0 s later. How high is the cliff? The speed of sound is 340 m/s, and assume air resistance is negligible.
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Chapter 2 Solutions
University Physics (14th Edition)
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