From
a school laboratory to a research lab spring scales are a versatile yet
inexpensive way to weigh a wide variety of materials. A spring scale used in
the physics laboratory typically works as a basic acccelerometer and
measures the force of gravity exerted on a mass. The unit by which this
force is measured is known as Newtons. 1(one) newton is equivalent to the
weight of about a tenth of a kilogram of mass. The Spring Scale is also
known by the name of Newton Meter, as it is used for measuring newtons.
A Spring Balance apparatus is really very simple. It is a spring that is
fixed at one end with a hook. On the other end the object to be measured is
attached. A spring scale works on the principle of Hooke's Law. According to
which the force that is required to stretch a spring is proportional to the
distance by which spring gets extended from its original rest position.
Thaqt is the reason why the scale markings on a spring scale have equal
spacings.
Spring scales are available in different sizes. Small scales that measure
newtons have normally a less firm spring (the one with a smaller spring
constant) as compared to the really larger ones which has the ability to
measure tens, hundreds or thousands of newtons.
In cases where two spring scales are hung just one below the other, then
the one at the top is supposed to read two weights The weight of the body
hung that is on the lower scale along with the weight of the lower scale.
Though Spring scales are very popular and are used widely but they suffer
from some limitations. One, with continuous use the spring in the scale
tends to stretch permanently. Two unable to withstand sudden load releases
thus leading to breakage.
Types of Spring scale
Dial
type spring scale
Dial type spring scale is mostly used in the school physics lab to
familiarize the students with the concept of weight and force.This type of
Spring scale can be used for examining the buoyancy law and the directional
force vectors.
Tubular
Spring Scale
Tubular Spring scales feature a very simple design which clearly depicts
the structure of spring scales to the students.
Pull
Type Spring Scales
By far the most popular of the varieties of Spring scale available, this
versatile and convenient Spring scales allows measuring of weights in
newtons, pounds, grams and ounces. Apart from routine weighing they can also
be used for force and motion experiments. Latest range of Pulltype Spring
scales are available as color-coded and with a clear plastic tube design to
allow students to clearly see and understand the spring action.
