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Calculations of objects on springs exhibiting simple harmonic motion.

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Practice Springs
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Measuring the elasticity of materials


Mass & Springs (PhET Simulation)

Time for Practice

  1. A rope can be considered as a spring with a very high spring constant k,so high, in fact, that you don’t notice the rope stretch at all before it “pulls back.”
    1. What is the k of a rope that stretches by 1mm when a 100kg weight hangs from it?
    2. If a boy of 50kg hangs from the rope, how far will it stretch?

Answers to Selected Problems

  1. a. 9.8×105N/m b. 0.5mm 


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