for 4 seconds after both movements are completed.how far is the train located from its starting point.(note we are asking for the trains final location,not the total distance that is traveled)
choices 18m,19m,20m,22,
2007-04-18 09:53:00 · 3 answers · asked by jmrripley@yahoo.com 1 in Cars & Transportation ➔ Rail
Ok, this is a common sense question.
+1m/sec * 20 sec = 20 meters (positive for forward)
-0.5m/sec * 4 sec = -2 meters (negative because it's backward)
Distance from it's starting point = 20-2 = 18 meters
This ASSUMES instantaneous braking in both directions, we all know what happens when assumptions are made...
2007-04-18 10:28:04 · answer #1 · answered by hsueh010 7 · 0⤊ 0⤋
1 m/3 ? or 1 m/s ?
If it is 1 m/s for 20 seconds, the train is 18m from it's starting point.
2007-04-18 17:24:52 · answer #2 · answered by vfa25 2 · 0⤊ 0⤋
Take your Mathematics question over here...http://answers.yahoo.com/dir/;_ylt=Ao5Mut7MGTjMdl7xQRr1b_H4xQt.?link=list&sid=396545161
Here we do applied physics, and we do it in feet and miles, so take the Metric system with you :)
2007-04-18 19:30:27 · answer #3 · answered by Wolf Harper 6 · 0⤊ 2⤋