Источник / закреплённая редакция
Newton's Second Law
Источник пакета openstax.second_law_readings · OpenStax University Physics, ch. 5 Newton's Laws of Motion, module m58297
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- urn:openstax:clir:second-law-readings#M58297
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- OpenStax University Physics, ch. 5 Newton's Laws of Motion, module m58297
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- urn:openstax:clir:second-law-readings#treatise
m58297/index.cnxml at commit d0ed34a (main, 2026-06-11)
- edition
- urn:openstax:clir:second-law-readings#M58297_MAIN
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- en
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- adopted: 2026-06-11
Публикации
| URI | Тип | documentHash | Получено |
|---|---|---|---|
| https://raw.githubusercontent.com/openstax/osbooks-university-physics-bundle/d0ed34a5851119a42e3d972dfc0ff49e4663977c/modules/m58297/index.cnxml | application/xml; charset=utf-8 | sha256:7e9cace9acb5f28380e058b277fdcaf187baceec9a5d7633893ba352933d4636 | 2026-09-06T00:00:00Z |
Фрагменты — 2
module/m58297#fs-id1165039477315 · defn · на него ссылаются: 6
en · official · sha256:09f3c30f51a565d75c380e101ff9e0d8efec97100c42a205f277244577baee87EN
<definition id="fs-id1165039477315">
<term>Newton’s second law of motion</term>
<meaning id="fs-id1165039477320">acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system and is inversely proportional to its mass</meaning>
</definition>Ссылаются нормы: OpenStaxReading/NetForceDisagreesWithMassTimesAcceleration, OpenStaxReading/NetForceEqualsMassTimesAcceleration, PrincipiaReading/ChangeOfMotionAccountsForForce, PrincipiaReading/ReversedMotionAlsoAccountsForForce, acceleration_of, mass_is_constant
module/m58297#fs-id1165039096883 · section
en · official · sha256:e0a056e7c4b8391273562f713547af763c7ab6cca38c69b6430f56f74b00a3c2EN
<note id="fs-id1165039096883">
<title>Newton’s Second Law of Motion</title>
<para id="fs-id1165038999240">The acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system and is inversely proportional to its mass. In equation form, Newton’s second law is</para>
<equation id="fs-id1165039299982" class="unnumbered"><label/><m:math><m:mrow><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>a</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle><m:mo>=</m:mo><m:mfrac><m:mrow><m:msub><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>F</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle><m:mrow><m:mtext>net</m:mtext></m:mrow></m:msub></m:mrow><m:mi>m</m:mi></m:mfrac><m:mo>,</m:mo></m:mrow></m:math></equation>
<para id="fs-id1165039257622">where <m:math><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>a</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle></m:math> is the acceleration, <m:math><m:mrow><m:msub><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>F</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle><m:mrow><m:mtext>net</m:mtext></m:mrow></m:msub></m:mrow></m:math> is the net force, and <emphasis effect="italics">m</emphasis> is the mass. This is often written in the more familiar form</para>
<equation id="fs-id1165039079819"><m:math><m:mrow><m:msub><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>F</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle><m:mrow><m:mtext>net</m:mtext></m:mrow></m:msub><m:mo>=</m:mo><m:mstyle displaystyle="true"><m:mo>∑</m:mo><m:mrow><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>F</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle><m:mo>=</m:mo><m:mi>m</m:mi><m:mstyle mathvariant="bold" mathsize="normal"><m:mover accent="true"><m:mi>a</m:mi><m:mo stretchy="false">→</m:mo></m:mover></m:mstyle></m:mrow></m:mstyle><m:mo>,</m:mo></m:mrow></m:math></equation>
<para id="fs-id1165039083076">but the first equation gives more insight into what Newton’s second law means. When only the magnitude of force and acceleration are considered, this equation can be written in the simpler scalar form:</para>
<equation id="fs-id1165039009387"><m:math><m:mrow><m:msub><m:mi>F</m:mi><m:mrow><m:mtext>net</m:mtext></m:mrow></m:msub><m:mo>=</m:mo><m:mi>m</m:mi><m:mi>a</m:mi><m:mo>.</m:mo></m:mrow></m:math></equation>
</note>Хэш рядом с текстом — sha256 его точных байтов. Он и есть проверка того, что показанный текст совпадает с закреплённым в пакете: расхождение роняет статику оракула.