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equilibrium line lies in between the distance from AB to CD amplitude is 4cm as evident from the equation so 2*4cm =8cm which the answerHai guys,need a help here.Thanks in advance.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_43.pdf
Question 3a(part1).The answer is 8cm.