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Polythene

A polythene strip does not obey Hooke's law. Thin strips of polythene are very easy to stretch and undergo plastic deformation with very little force.The extension during unloading is greater than the extension during loading and the material does not return to its original length.

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Specification: OCR Physics A (H156), AS-level, 3.4.1 Springs. Topic: Materials.

Key terms in this lesson

energy
The capacity of a system to do work.
kinetic energy
The energy an object possesses due to its motion.
linear momentum
The product of an object's mass and its velocity.

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