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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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While riding on an elevator descending with a constant speed
of 3.0 m>s, you accidentally drop a book from under your arm.
(a) How much time does it take for the book to reach the elevator
floor, 1.2 m below your arm? (b) What is the book’s speed relative
to you when it hits the elevator floor?
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- An object is thrown vertically downward at 18 m/s from a window and hits the ground 1.6 s later. What is the height of the window above the ground? (Air resistance is negligible.)arrow_forwardA baseball player throws a ball into the air with an initial speed of 27 m/s [up]. Ignore air resistance. (a) How high does the ball go? (b) How long is the ball in the air before she catches it?arrow_forwardA hoodlum throws a stone vertically downward with an initial speed of 12.3 m/s from the roof of a building, 20.0 m above the ground. (a) How long does it take the stone to reach the ground?(b) What is the speed of the stone at impact?arrow_forward
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