Question:
can someone tell me the "usual" ratio of horsepower to mph?
Answers:
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I don't think there can be a "usual", and here's the reason. If you take a 500 horsepower engine and attempt to move the Empire State Building with it, your mph will be pretty much zero. But, a little over 100 hp will drive my Toyota MR2 over 120 mph pretty easily.Ok, it Windex doesn't damage brakes...?
But, while weight may seem to be a factor, it is not really a direct factor at all. It is a factor in "acceleration" which is the rate of increase in speed. But, ultimately, it comes down to resistance. Tire rolling friction resistance. Wind resistance. And many other things. There is a limit to the speed which the engine will turn and the gear ratios of the transmission and differential will affect torque and accelleration and the ability to pull trailers and such as well as top speed.
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A 100 hp engine in a motorcycle can make it quite fast, but the same engine in a van will be dog slow.
In physics, there is an equation f=ma. It means force is equal to mass times accelleration. If force and mass are steady, then accelleration will be steady and then you can calculate speed or velocity as v=ta or velocity is time multiplied by accelleration.
But, that is almost never a something you would find in the land of reality. Accelleration and force always change. Not only that, but there is a limit to how fast something can go which is the speed of light. But, we don't find many vehicles travelling that fast these days. Otherwise people would probably be paying big money to climb into them to get the relativistic effects of stopping the aging process thinking somehow this would be a fountain of youth, but even if such a vehicle could be built, it would not reverse the aging process but only stop it.
i've a toro s-630 snowthrower and when i start it it tends to stall ,?
But, unless you get one of those super fast motorcycles or cars, you won't even come close to approaching any effects of relativity. Now, I have had a few reasons to doubt this, looking at Cher and Tina Turner and the guy who was called the "oldest living teenager" on American Bandstand :-)
why does my truck move forward when i start it?
There isn't a ratio. The power required to move at a particular speed goes as the cube of that speed, which is why race cars need such powerful engines.my car is making this sound...?
horsepower really doesn't have much to do with it. it's more a matter of gearing. (trans and rear gear) aerodynamics also plays a big part as well.In my days of drag racing the formula was: Going fast cost cubic dollars! Good luck, but I did like the scientific answer best.
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