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Question

How do you know if a spring obeys Hooke's Law?


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Solution

Explanation:

  1. Hooke's law asserts that within the elastic limit of a material, the strain is proportional to the applied stress.
  2. F=kx, Where, F= Force, x= Elongation and k= Spring constant

Draw a diagram,

Therefore,

  1. Record each stretching force in Newtons and the accompanying length of the spring to determine whether or not the provided spring obeys Hooke's law.
  2. The increased length minus the unloaded length is the extension. ( xf-xi)
  3. Since Hooke's Law is fulfilled, a graph of stretching force against extension is a straight line through the origin as long as the limit of proportionality is not exceeded.

Hence, this is the way to know if a spring obeys Hooke's Law.


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