Balance scales work by placing items of equal mass onto two hanging pans, according to Math Is Fun. In order to determine how much a single object weighs, a standard weight is placed in one pan and the object of unknown ... More »

A spring balance uses the extension of a spring to measure a force. Spring scales, such as are often found in supermarkets, are a common type of spring balance. The spring balance relies on Hooke's Law, which states that... More »

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Some scales, such as bathroom scales, can be calibrated by simply using known weights and adjusting the scale reading to match the amount of the known weight. Digital scales can be calibrated using a weight and the scale... More »

Spring scales measure the magnitude of forces, most commonly weight, which is the downward force of gravity on an object. It works from the principle laid down by Isaac Newton in his third law of universal motion, that f... More »

The instruments used to measure the mass of an object are scales and balances. Several different types of scales and balances exist and are used based on the type of measurement needed. More »

According to American Weighing Scales, different types of platform scales are composed of different parts and use different terminology. However, there are two main types: spring scales and balance beam scales. The main ... More »