2007_Fall_P112_Lab_02_Prelab

2007_Fall_P112_Lab_02_Prelab - Lab Section: _ Name: _ Lab...

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Lab Section: ______ Name: ______________________________ Lab Instructor: ______________________________ P112 Lab Notes Pre-lab 2-1 Cornell University, Fall 2007 Lab Unit # 2 Pre-lab Questions: Force Laws 1. A spring of stiffness is connected in PARALLEL with a spring of stiffness . What is the effective spring constant of this combination? Derive an expression for in terms of and . 1 k 2 k p k p k 1 k 2 k [HINTS: Assume that a force of magnitude F pulls at both ends of the parallel combination, stretching both springs by the same amount x . The magnitude of this force F equals the sum of the magnitudes of tension forces and due to the individual springs. Start with , where x is the extension of the combination of springs, and then express this in terms of and . How is related to and ?] 1 F 2 F x k F p = 1 F 2 F p k 1 k 2 k F k 1 k 2 F 2. A spring of stiffness is connected in SERIES with a spring of stiffness . What is the effective spring constant of this combination? Derive
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2007_Fall_P112_Lab_02_Prelab - Lab Section: _ Name: _ Lab...

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