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OOO O My Portal | Clovis Community X E Grades for Kareem Algatami: Fx M WileyPLUS x ' C Chegg Study | Guided Solution x C CMy Portal | Clovis Communitx 1 0 F - C i Secure https://edugen.wileyplus.com/edugen/lti/main.uni IS Halliday, Fundamentals of Physics, 10e Help | System Announcements (1 Unread) PRINTER VERSION 4 BACK NEXT Your answer is partially correct. Try again. ASSIGNMENT RESOURCES PHYS 4A Homework 7 (Ch. 7, 8) Chapter 07, Problem 028 a Chapter 07. Problem 032 D Chapter 08, Problem 013 Chapter 08, Problem 019 2 Chapter 08, Problem 029 The first figure gives spring force Fx versus position x for the spring-block arrangement of the second figure. The scale is set by F5 = 180 N. We release the block at x = 15.0 cm. How much work does the spring do on the block when the block moves from xy = +8.0 cm to (a) x = +6.0 cm, (b)X = -6.0 cm, (c) x = -8.0 cm, and (d) X = -10.0 cm? -x (cm) Review Score Review Results by Study Obiective x=0 F, = 0 protein - Block attached to spring * positive E, negative EP 000 v (b

Explanation / Answer

work done by the spring is w = 1/2k(xi^2-xf^2)

a) k = f/x = 180/0.15 = 1200 N/m

w = 1/2*1200(0.08^2-0.06^2) = 1.68 J

b) w = 1/2*1200(0.08^2-(-0.06)^2) = 1.68 J

c) w = 1/2*1200(0.08^2-0.08^2) = 0

d) w = 1/2*1200(0.08^2-0.1^2) = -2.16 J

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