Force and materials

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Force and materials:

  • A material is elastic if it returns to its original shape and size when the force is removed.
  • A material is plastic if it doesn't return to its original shape and size when the force is removed.

Most materials are elastic for a certain range of forces - up to the elastic limit. Beyond this limit, they're plastic.

Hooke's law states that the extension, x, of a sample of material is proportional to the stretching force, F. xF. This can be reinterpreted as F = kx, where k represents

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