EW History Bookmarks People Window Help MasteringPhysics: Ch 09 HW Part 2 Secure

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EW History Bookmarks People Window Help MasteringPhysics: Ch 09 HW Part 2 Secure https://session.masteringphysics.com/myct/itemView?assignmentProblemiD-78596096&offsetenext; 09 HW Part2 Problem 9.47 roblem 9.47 Part A Stretching a certain spring 0.10 m from its relaxed length requires 30 J of work. How much more work does it take to stretch this spring an additional 0.10 m? Express your answer with the appropriate units. w- 30 Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining

Explanation / Answer

formula for work to strectch the spring is

W= 1/2 k x^2

W1 = 1/2 k x1^2

W2 = 1/2 k x2^2

W2/W1 = x2^2/x1^2

W2 = W1 ( x2/x1)^2

= 30 J ( 0.2/0.1)^2

=120 J

more work = W2- W1 = 120 J- 30 J = 90 J

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