Hooke's Law & Extension | GCSE Physics Practice
Force and extension are proportional, provided the limit of proportionality is not exceeded.
Can you use F = ke correctly?
What is Hooke's Law & Extension | Practice?
"The law stating that the strain in a solid is proportional to the applied stress."
What is the unit of the spring constant (k)?
A spring has a constant of 50 N/m. How much force is needed to extend it by 0.1m?
What happens beyond the limit of proportionality for a spring?
Elasticity Facts
Spring constant (k) is measured in N/m.
Extension is the change in length, not the total length.
Beyond the elastic limit, the object stays deformed (plastic deformation).
Math Tip: Ensure extension is in metres (m) before using the formula!
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