*90. A skydiver is falling straight down, along the negative y di- rection. (a) During the initial part of the fall, her speed increases from 16 lo 28 m/s in 1.5 s, as in part a of the figure. (b) Later, her parachute opens, and her speed decreases from 48 to 26 m/s in 11 s, as in part b of the drawing. Concepts: (i) Is her average acceleration positive or negative when her speed is increasing in part a of the figure? (ii) Is her average acceleration positive or negative when her speed is decreasing in part b of the figure? Calculations: In both instances (parts a and b of the figure) determine the magnitude and direction of her average acceleration. Problem 90 (9) (v)

*90. A skydiver is falling straight down, along the negative y di- rection. (a) During the initial part of the fall, her speed increases from 16 lo 28 m/s in 1.5 s, as in part a of the figure. (b) Later, her parachute opens, and her speed decreases from 48 to 26 m/s in 11 s, as in part b of the drawing. Concepts: (i) Is her average acceleration positive or negative when her speed is increasing in part a of the figure? (ii) Is her average acceleration positive or negative when her speed is decreasing in part b of the figure? Calculations: In both instances (parts a and b of the figure) determine the magnitude and direction of her average acceleration. Problem 90 (9) (v)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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