A particle oscillates in one dimension about the equilibrium position subject to a force Fx(x) that has an associated potential energy U(x). If k is the force constant, which one of the following relations is true?

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Q: 78 (NDA-I/2010)
A particle oscillates in one dimension about the equilibrium position subject to a force Fx(x) that has an associated potential energy U(x). If k is the force constant, which one of the following relations is true?
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question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,2,5,2,2,1,2

keywords: 

{'kx2': [0, 0, 1, 0], 'potential energy': [0, 0, 1, 4], 'kx': [0, 0, 1, 0], 'particle oscillates': [0, 0, 1, 0], 'jx': [0, 0, 1, 0], 'equilibrium position': [0, 0, 1, 0], 'force': [0, 0, 0, 2]}