5.5 - elasticity , spring constant & hooke's law

what is meant by the term ‘deformed’?

changed shape

what is elastic deformation?

an object returns to its original shape after the force is removed

what is inelastic deformation?

an object does not return to its original shape after the force is removed

what is extension?

the increase in length of a spring when it is stretched

what does adding more mass do to the extension?

the extension increases proportionally

what does hooke’s law state?

the extension of an object is directly proportional to the force applied

how many forces are needed to stretch, compress or bend an object?

more than one

what is spring constant?

how many newtons it would take to stretch an object by one metre.

what does a higher spring constant mean for an object?

the material is stiffer (less elastic)

what is the limit of proportionality?

when hooke’s law no longer applies - the extension is no longer proportional to the force