Activity 5.

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Activity 5.

Bericht van Admin op wo dec 21, 2016 5:54 pm


  • The set of axes used to plot the results depends upon the spring. Student's own results.
  • The line starts at the origin, because a force of 0 N on the spring gives an extension of 0 cm.
  • When the force on the spring is multiplied by 2 the extension increases by a factor of 2.
    When the force on the spring is multiplied by 3 the extension increases by a factor of 3.
  • The relationship between force and extension is linear: the extension is directly proportional to the force. The line on the graph is therefore a straight line.
  • Student's own graph.
  • You can measure the extension for this unknown force and then read off the force from the graph.
  • The extension of a rubber band is not linear (i.e. even). A rubber band extends proportionally more under a large load/force.
  • If you use a weaker spring it will extend more when subject to the same force than a stiffer spring. The line on the graph will be steeper.
  • When you overload a spring it extends so far that the metal loses its elasticity and cannot return to its original form. (This is called plastic deformation.)

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