(BadTextbooks) Slide-16  <NextSlide>  AFTER you have studied THIS Slide)
...in MKSetcSystem==>

<==from HyperPhysics/Atlanta... speed[L/t], velocity[dL/t]:
   ReWrite "Coulomb's Law":
   (1) Force[dLm/tt] = dq1q2/e0r2. <==Coulombs RealLaw(now).

Sad, that HyperPhysics/Atlanta...
    o Ignores direction[d]... and Inserts 4p("Rationalized"!!)