L3: Hooke's law Flashcards
what is an anomalous result?
a result that doesn’t fit in with the pattern of the other results
what does it mean when something is behaving elastically?
when a material returns to its original size and shape when you remove the forces stretching.
what does it mean when something is behaving inelastically?
when a material stays deformed after you have taken the forces stretching away
what did Hooke discover?
the amount an elastic material stretches is proportional to the amount of force applied to it
what does Hooke’s law mean?
if you double the force its extension will double, if you triple the force the extension will triple and so on.
what is the elastic limit?
the maximum amount a solid may be stretched without permanent change to size or shape
what happens at the elastic limit?
the material stops behaving elastically and shows plastic behaviour instead
what is plastic behaviour?
when a material deforms irreversibly and does not return to its original shape or size, even when the force on the object is removed
what is a systematic error?
when there is a similar error in every repeat
what happens when you reduce the systematic error?
your accuracy will improve- how close the value is to the true value
what will a random error cause?
repeats to be different and anomalous results
what happens when you reduce the random error?
improves your precision- how close repeats are together
what was Hooke’s law equation?
force = spring constant x extension
f=k x e
what is spring constant measured in?
newton per meter (N/m)
what is the extension measured in?
meters (m)
