Spring scale
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A spring scale (or spring balance) is a weighing scale often used to measure force, such as the force of gravity, exerted on a mass or the force of a person's grip or the force exerted by a towing vehicle. This force is commonly measured in newtons. The spring scale can also be correctly called a Newton Metre.
Many spring scales are marked right on their face "Not Legal for Trade" or words of similar import. Some spring scales can be calibrated for the accurate measurement of mass in the location in which they are used. The spring scale works on Hooke's Law.
If the two spring scales are hung one below the other both will read the weight of the body hung on the lower scale.
Spring scales come in different sizes. Generally, small scales that measures newtons will have a weaker spring than larger ones that measures tens, hundreds or thousands of newtons.
[edit] See also
- Weighing scale
- Newton Metre
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