GCSE Combined Science (AQA)

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Forces Forces and elasticity

Deformations

3:25 Deformations and Springs
Spec 4.5.3
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  • Deformation occurs when a force causes an object to change shape.
  • Stretching an elastic band is an example of deformation.
  • Multiple balanced forces must be applied for deformation to occur.
  • Forces can change an object's speed or direction based on the overall force.
  • Two forces can deform an object without moving it overall.
  • Example: One hand pulls on an elastic band while the thumb provides an equal and opposite force.
  • Three types of deformation: stretching, compressing, and bending.
  • Stretching: Two balanced forces directed away from each other cause an object to stretch (e.g., elastic band, spring).
  • Compressing: Two balanced forces directed towards each other cause an object to compress (e.g., spring).
  • Bending: Three or more balanced forces at different points cause an object to bend (e.g., rod with two downward forces at ends and an upward force in the middle).
  • For exams, identify the type of deformation from the context of a question.

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