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Newton and f ∝ Δp/Δt

  1. Feb 25, 2014 #1
    How did Newton come up with
    f ∝ Δp/Δt ??
     
  2. jcsd
  3. Feb 25, 2014 #2
    Galileo's equation for uniform acellerated motion

    v=at so multiply both sides by mass m

    mv=mat

    so
    mv=ma(t) and call ma force F

    mv=Ft
    so
    Ft=mv

    Divided both sides by t

    F=(mv)/t

    Didn't Torricelli (Galileo's student) do this before Newton?

    Also
    F=(mv)/t
    so
    F=m(v/t) and call v/t acelleration a

    F=ma
     
    Last edited: Feb 25, 2014
  4. Feb 25, 2014 #3

    adjacent

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    Gold Member

    See this
     
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