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Natural Science Forum / Physics / Relativity / July 2006Do The Math: Save Gas By Driving Slower
Work = Force X Distance. So obviously it takes more force to drive faster in a car, and the same distance is traveled regardless of how fast you are going. So if we reduce the speed limits we will save money and gas!!!! > Work = Force X Distance. So obviously it takes more force to drive > faster in a car, and the same distance is traveled regardless of how > fast you are going. So if we reduce the speed limits we will save money > and gas!!!! Yes, provided we introduce a minimum speed as well. See also http://auto.howstuffworks.com/question477.htm Dirk Vdm >> Work = Force X Distance. So obviously it takes more force to drive >> faster in a car, and the same distance is traveled regardless of how >> fast you are going. So if we reduce the speed limits we will save money >> and gas!!!! [Hammond] ... according to your theory if you go 30 instead of 60 you will use HALF AS MUCH GAS to go the same distance... ..........any IMBECILE knows that's NOT true! Fact is the "rolling resistance" of a car is nearly independent of the speed (due mainly to the soft tires).. it is only because "air resistance (which only amounts to something at high speeds) increases as the square of the car's speed that there is any (marginal) difference in mileage at any speed. ======================================== SCIENTIFIC PROOF OF GOD WEBSITE http://geocities.com/scientific_proof_of_god mirror site: http://proof-of-god.freewebsitehosting.com ======================================== Fact is, gas mileage only MARGINALLY decreases with speed............. mainly because "wind resistance" is a quadratic function of the cars velocity.... but the fundamental "rolling resistance" of the car is virtually independent of speed. ======================================== SCIENTIFIC PROOF OF GOD WEBSITE http://geocities.com/scientific_proof_of_god mirror site: http://proof-of-god.freewebsitehosting.com ======================================== Dear virtualadepts: > Work = Force X Distance. Power = force x velocity > So obviously it takes more force ... Power ... > to drive faster in a car, and the same distance > is traveled regardless of how fast you are going. > So if we reduce the speed limits we will save > money and gas!!!! Not strictly true. An IC engine consumes gasoline even if you aren't moving. Yes, if you keep your speed 45-60 (depending on gearing), you'll save some money on gasoline. Likely you'll save even more if you can keep rolling at constant speed for your entire trip, even if that is 70 mph (sompared to stop and go). You'll save even more if you use a hybrid, which only powers the engine when the batteries get low. You'll save even more if you don't have 1000+ pounds of metal and plastic haul your b*tt around. David A. Smith |
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