Young Modulas Flashcards
Hookes law
Spring force (F) = negative spring constant (-k) x extension (x)
What is limit of proportionality
Where the spring stops obeying Hookes law
What is elastic limit
Max point of where it can be stretched and return to previous shape
What is the yield point
The point it becomes plastic
What is breaking stress
The max stress a material can stand
What comes first on a graph
Limit of proportionality
What is stored under graph before limit of proportionality
Elastic potential energy
How to work out elastic potential energy
EPE = 1/2 x Force (F) x Extension (/|x)
Factors affecting extension
- Force
- Cross sectional area
- Material
- Original length
How to work out stress (Pa)
Force / Area
How to work out strain
Extension / Original lenth
How to work out Young modulas (Symbol = E)
Stress / Strain
If large strain for little stress…
Material is flexible
If little strain for large stress…
Material is stiff
