| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
| W |
A spring will deform (stretch or compression) until the tension balances the load placed upon it. |
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What causes a spring to deform? How does a spring balance (Newton Meter) work?
Why does it go to the same place on the scale each time the same force is applied? |
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| D |
Make measurements of spring in compression as force is changed |
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Thread a compression spring over a weight hanger and then put weights on top. |
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| W |
When a spring (or any object) is deformed elastically it will go back to its original shape. |
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What happens to an object when it is deformed elastically? |
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| T |
When a spring (or any object) is deformed elastically, there is work done as kinetic energy is transformed into elastic (strain) potential energy. |
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What energy transfers occur when an object is deformed elastically? Energy transfer diagram for stretching a Y - shaped catapult. |
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| W |
The elastic (strain) potential energy can be retrieved as the object returns to it shape, normally in the form of kinetic energy. |
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What happens to the elastic potential energy of a spring as it returns to its original shape? Energy transfer diagram for releasing a Y - shaped catapult. |
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When a spring (or any object) is deformed plastically it will not go back to its original shape. |
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What happens to an object when it is deformed plastically? |
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When a spring (or any object) is deformed plastically kinetic energy is used to overcome the forces between particles.
This energy ends up as thermal energy as the particles are vibrating more. |
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What energy transfers occur when an object is plastically deformed and where is the energy? |
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While in the linear region of a force-extension graph, the spring is obeying Hooke's Law and the deformation is elastic.
Past the limit of proportionality, the spring does not obey Hooke's Law and is being plastically deformed. |
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What is happening to a spring during the linear region of a force-extension graph?
At what point does the spring stop obeying Hooke's law? Show:
http://www.a-levelphysicstutor.com/matter-elasticity.php
YES THIS WAS A' LEVEL! |
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