With a force strong enough Push or pull something Causing Defformation Meaning transformation Of its shape, and/or size But what happens next relies On properties of thing Those Elastic tend to spring Back or near to starting form While for Plastic it’s the norm For new shapes and sizes to Linger in their contours new [Break] Squeeze a metal spring Stretch a rubber band In either case be careful to Use a somewhat gentle hand [Break] Then from grip let them escape See each snap to former shape If max force did not outstrip The Elastic Limit [Break] For there's a level of force That breaks all things, of course But slightly past this Limit will bring A Defformation enduring [Break] Now to those materials That we term as Plastic Or else they may be Worded “Inn-elastic” [Break] These show Defformation Without restoration Even when the force is low To starting form they will not go [Break] Think metal wires or clay As you shape them, they will stay But as you may have noticed Wires and springs can both consist [Break] Of the same material But act in inverse way So Plastic or Elastic trait Sometimes shaping can convey [Break] With a force strong enough Push or pull something Causing Defformation Meaning transformation Of its shape, and/or size But what happens next relies On properties of thing Those Elastic tend to spring Back or near to starting form While for Plastic it’s the norm For new shapes and sizes to Linger in their contours new [Break] But what of those materials That neither bend nor snap back And above a certain force Break, or at best crack? [Break] These are known as Brittle Think glass and porcelain Lacking force absorption Especially when thin [Break] Yes, metal can also Take up this quality Cold, impure, hardened, old Wires and springs break easily [Break] Lastly, to Hooke's Law That governs stretch and squeeze For Elastic obb-jects in Proportional degrees [Break] Meaning if we double force Extension or compression Will be doubled also And this we can show [Break] With straight line on a graph From the Origin Meaning zero-zero is Where this line must begin [Break] To Elastic Limit Where straight line does end For more force over that Will obb-ject break or bend [Break] With a force strong enough Push or pull something Causing Defformation Meaning transformation Of its shape, and/or size But what happens next relies On properties of thing Those Elastic tend to spring Back or near to starting form While for Plastic it’s the norm For new shapes and sizes to Linger in their contours new
