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Answered

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How much energy is stored in a spring with a spring constant of 390 N/m if the spring is compressed a distance of 0.45 m from its free length?

Group of answer choices

79 J

34000 J

39 J

180 J

88 J

Sagot :

F=-ks
F=-(390)(.45)
F=-175.5 N

Work=force x displacement
Work= 175.5(0.45)
Work= 78.98 J

Work = ∆E =78.98 J

Answer=79J (first option)
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