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Two springs of the same stiffness and different lengths have loads hung from them and the graph to the right shows the results. Which of the springs is the longer?

Spring 1
Spring 2

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A student conducted an experiment where a spring was loaded with weights and the resultant extensions were plotted on the graph to the right. Why do you think the graph shaped as it is?

The student conducting the experiment took incorrect results
The spring underwent plastic deformation
The spring underwent non-linear elastic deformation
The spring suffered a failure
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Which of these statements gives the best definition of Hooke's Law?

Tensile strain is inversely proportional to tensile stress during elastic deformation
Tensile stress is directly proportional to the square of the tensile strain during elastic deformation
Tensile strain is directly proportional to tensile stress during elastic deformation

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