2.) In what way is the Hooke’s law a useful property when calibrating a spring for measuring forces?

Answer 1

Hooke's law-"deflection is proportional to load" - is credited with the start of the spring business as we know it today.
The fact that solid structural members, especially metallic ones, are known as springs developed as a matter of convenience and custom rather than any direct outgrowth of Hook's law.
The common denominator is the application of Hooke's law to the design and production of metal parts made to customer specification from materials with "spring-like" qualities.

Answer 2

Hooke's Law states that the ''deformation of a material is proportional to the force applied to it, provided the elastic limit is not exceeded''

To help you calibrate a spring to measure forces, you can first determine the elastic limit of the spring then state that as the spring's maximum weight as a warning, then you can test applying forces to the spring to check the deformation level, and from this you should be able to measure the force.

Answer 3

Hooks law indicates that the stress in a material is directly proportional to the strech at constant temperature.
That means that if you add a weight to the spring it would strecth it at a distance in proportion to the weight . So by measuring the distance that the spring streched you can determine the spring constant.