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mc2_phy
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why is it a derived quantity?
Specifying and choosing base units is a minefield.mc2_phy said:why is it a derived quantity?
Jupiter6 said:Energy is not conserved like momentum is and it should not be relied on alone in real-world calcs. So given that, I'd call energy a double-derived unit.
Drakkith said:What do you mean? Energy isn't conserved at all, or it's conserved differently than momentum?
sophiecentaur said:He's right, in as far as Momentum stays as Momentum but KE is not conserved and can turn up as thermal, electrical etc. which makes it much less useful for dynamics questions, for instance.
Derived quantities are important in science because they allow us to make measurements and calculations that are not directly measurable. They are based on fundamental quantities, such as length, time, mass, and electric current, and help us to better understand and describe the physical world around us.
A derived quantity is a physical quantity that is derived from one or more fundamental quantities using mathematical operations. These operations can include addition, subtraction, multiplication, division, and raising to a power.
Derived quantities differ from fundamental quantities in that they are not directly measurable and require calculations to determine their value. Fundamental quantities, on the other hand, are base units that can be measured directly.
Examples of derived quantities include velocity (derived from length and time), acceleration (derived from velocity and time), force (derived from mass and acceleration), and electric power (derived from electric current and voltage).
Derived quantities are used in scientific research because they allow us to make precise and accurate measurements and calculations. They also help to simplify complex systems and relationships, making it easier to understand and analyze data in various fields of study.