183_notes:acceleration

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183_notes:acceleration [2014/07/11 01:56] – [Why not just use change in momentum?] caballero183_notes:acceleration [2021/02/04 23:19] – [Newton's Second Law] stumptyl
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 ==== Newton's Second Law ==== ==== Newton's Second Law ====
  
-The Momentum Principle (or Newton's Second Law) is a quantitative description for how a system changes it momentum when the system experiences an external force. You might already know that another way to write this principle uses the concept of acceleration (how the velocity changes with time). Mathematically, we can write Newton's Second Law like this:+The Momentum Principle (or Newton's Second Law) is a quantitative description for how a system changes its momentum when the system experiences an external force. You might already know that another way to write this principle uses the concept of acceleration (how the velocity changes with time). Mathematically, we can write Newton's Second Law like this:
  
 $$\vec{F}_{net} = m\:\vec{a} = \dfrac{\Delta\vec{p}}{\Delta t}$$ $$\vec{F}_{net} = m\:\vec{a} = \dfrac{\Delta\vec{p}}{\Delta t}$$
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 $$\vec{a} = \dfrac{\Delta\vec{p}}{m\:\Delta t}=\dfrac{m\Delta\vec{v}}{m\:\Delta t}=\dfrac{\Delta\vec{v}}{\Delta t}$$ $$\vec{a} = \dfrac{\Delta\vec{p}}{m\:\Delta t}=\dfrac{m\Delta\vec{v}}{m\:\Delta t}=\dfrac{\Delta\vec{v}}{\Delta t}$$
  
-where the last two equals signs hold only if the mass of the system is not changing. +__//where the last two equals signs hold only if the mass of the system is not changing. 
 +//__
 ==== Acceleration ==== ==== Acceleration ====
  
  • 183_notes/acceleration.txt
  • Last modified: 2021/02/04 23:23
  • by stumptyl