Physical quantities such as force can be balanced or unbalanced, depending on whether the forces cancel each other out or not. Measuring devices and units are key to quantifying physical properties accurately.
Physical quantities that can be measured include time, mass, weight, force, and electric charge. Forces can be classified as balanced when they cancel each other out and result in no change in an object's motion, or unbalanced when there is a net force causing acceleration or deceleration.
Measuring devices like rulers for length, balances for mass, and spring balances for force play a crucial role in quantifying physical properties. These measurements are expressed as quantities, consisting of a number and a unit that represent a specific amount or magnitude.
Fundamental physical quantities like length, mass, time, electric current, and temperature are measured in base units, with other quantities like force and speed derived from combining these fundamental units mathematically.
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