fietsbob

1) you get it moving , 2) you keep it moving , being level its less than (1)

and of course (# 3) you get it to stop... So is that the sum of 1 + 2 ? ... your question..


Sir Isaac Newton was dead 90 years before Karl Drais bone shaker Laufmaschine was Patented, 1818 ,
in Germany..











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