Question

A spring balance works on the principle of

Answer 1

A Spring balance is a weighing scale. It comprises a spring fixed at one edge with a hook to join an object at the other. It operates by Hooke's law, which says that the force required to stretch Spring is proportional to Spring's distance from its standstill position. Therefore, the scale indicating the spring balance is evenly spaced. A Spring scale cannot estimate mass, only weight.

Complete step-by-step solution:
A spring balance estimates the weight of an object by resisting the force of gravity working with the force of an expansive spring. Spring balance is utilized to define the force acting on the object. Spring balance operates on the principle of Hooke’s law. Hooke’s law declares that the stretch of the material depends on the implemented stress within the flexible limit of that material.
A spring balance is a kind of mechanical force gauge. It comprises a spring attached at one end with a hook to join an object at the other. Hooke's Law operates by saying that the force required to extend a spring is proportional to the spring's length stretched from its rest position. If two or more spring balances are attached, one under the other in series, each of the systems will read nearly the same, the total weight of the body fixed on the lower scale. The system on top would read slightly heavier due to carrying the weight of the lower system itself.
Spring balances appear in different sizes. Usually, small scales that include newtons will have a smaller firm spring than longer ones that estimate tens, hundreds, or thousands of newtons or still more depending on the system of newtons applied.
Spring balance is utilized to estimate the object's weight. When a load is fixed on the Spring, it stretches, and the Spring's expansion is proportional to the object's weight. The practical principle of the spring balance is Hooke's law which is
$F = -kx$

Note: A spring balance may be specified in both units of force and mass. Strictly speaking, only the force amounts are accurately labelled. In order to judge that the identified mass values are correct, an object must be fixed from the spring balance at rest in an inertial reference frame, communicating with no other objects but the system itself.