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Show Stopping of Motor Car Is Explained - Mote ilsis who linvo itlven lliotiglit lo the matter tiro souio- .. w hat put-led to tindeiKluuil how ;; H Is thin rolnilvely lluUi effort - .. Is renulred li alop it car. 'Phey " recall the Ki-nerul law uf ph- les lo the elTeet Ihut "a iiiiicIiIiih i never enu produce nil Incivusu In lI'O tiniount of energy tip- " I! piled." They know that lint braklni; svsieui .- a machine !. mid they iihso reiill?.,. tlinl the iiioineiiiiiui which iiiusl ho .. .. checl.ed lu Ktopplng a car nvces- sarlly Is ureal. At a little over 17 miles per " " hour, a H (KHi pouiiil cur Kioren .. up a momentum that can be '.' measured In terms of 7.".IKK fool .. pounds. In oilier words, thai much work must be expended lo check the car's -peod. assuming a quick stop la made and the " momentum Is not dissipated " " through naturiil slowlui; down of '" the cur. I I M I I I I I I I I I I I I I 1 ... |