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*as of ‘16 SEPTEMBER 2023’*
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[“mass” is a ‘property’ of a ‘physical body’ which determines…]
*the ‘strength’ of its ‘mutual gravitational attraction’ to other ‘bodies’*
*its ‘resistance’ to being ‘accelerated’ by a ‘force’*
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(in the ‘theory of relativity’, ‘mass’ gives the “mass–energy content” of a ‘system’)
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(in ‘science’ and ‘engineering’, the weight of an object is usually taken to be the force on the object due to “gravity”)
(“weight” is a ‘vector’ whose ‘magnitude’ (a ‘scalar quantity’), often denoted by an italic letter W, is the product of the mass m of the object and the magnitude of the ‘local gravitational acceleration’ g; thus: “W = mg”)
(the unit of measurement for ‘weight’ is that of ‘force’, which in the ‘International System of Units’ (SI) is the “newton”)
(for example, an object with a ‘mass’ of ‘1 kilogram’ has a ‘weight’ of about ‘9.8 newtons’ on the surface of the ‘earth’, and about 1/6 as much on the ‘moon’)
(in this sense of ‘weight’, a body can be ‘weightless’ only if it is far away (in principle ‘infinitely far away’) from any other ‘mass’)
(although ‘weight’ and ‘mass’ are scientifically distinct quantities, the terms are often confused with each other in everyday use)
(there is also a rival tradition within “newtonian physics” and “engineering” which sees “weight” as that which is measured when one uses “scales”)
(there the ‘weight’ is a measure of the ‘magnitude’ of the ‘reaction force’ exerted on a ‘body’)
(typically, in measuring an object’s ‘weight’, the object is placed on ‘scales’ at rest with respect to the ‘earth’, but the definition can be extended to other ‘states of motion’)
(thus, in a state of “free fall”, the weight would be ‘zero’)
(in this second sense of ‘weight’, ‘terrestrial objects’ can be ‘weightless’)
(ignoring ‘air resistance’, the famous apple falling from the tree, on its way to meet the ground near ‘isaac newton’, is ‘weightless’)
(further complications in elucidating the various concepts of ‘weight’ have to do with the ‘theory of relativity’ according to which gravity is modeled as a consequence of the curvature of “spacetime”)
(in the ‘teaching community’, a considerable debate has existed for over half a century on how to define ‘weight’ for their students)
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(the current situation is that a multiple set of concepts co-exist and find use in their various contexts)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥