tjm73 said:It sounds as if what you are proposing is that if I floor my car and run it up to say 80 mph and let of it will immediatly stop accelerating at that speed and not go one bit faster. Or if I get to that speed and push the clutch in it will immediatly start to slow down..
tjm73 said:That is absurd and I suggest you go out and try it before you tell me "Newton's laws say it ain't happenin".
In physics, momentum is the product of the mass and velocity of an object. If it's gaining velocity at a rapid rate, even taking power away, it will for a short time continue to have momentum. And given the mass of the object it can still gain speed until friction over takes the available stored energy and starts to slow it down.
tjm73 said:It sounds as if what you are proposing is that if I floor my car and run it up to say 80 mph and let of it will immediatly stop accelerating at that speed and not go one bit faster. Or if I get to that speed and push the clutch in it will immediatly start to slow down.
That is absurd and I suggest you go out and try it before you tell me "Newton's laws say it ain't happenin".
In physics, momentum is the product of the mass and velocity of an object. If it's gaining velocity at a rapid rate, even taking power away, it will for a short time continue to have momentum. And given the mass of the object it can still gain speed until friction over takes the available stored energy and starts to slow it down.
tjm73 said:Take a 10" diameter 1" thick "wheel" of steel. Accerate it at a constantly rising rate and then abruptly take away the accelerating force. For a short time the wheel will continue to accerate due to it's mass.
tjm73 said:Well I say again....
Then please explain to me how my car continues to gain speed even after I have removed engine forces by depressing my clutch, disconecting forward motion providing power.
When I push the clutch in at 70 mph while accelerating hard, the car continues to gain some speed, all be it at a slower rate of gain and it continues to slowing rate. Yet it is still gaining speed. An additional 5-10mph is the norm.
And this is on flat, level ground.
DaNd4Speed said:We can't explain to you how it gains speed because IT CANT!!!
tjm73 said:Then explain what other forces are causing the car to continue to gain some speed. Everyone is quick to discount my ideas, but no one has offered any other explainations.
jstreet0204 said:I would look for a simpler explanation like the momentum of the speedo needle as opposed to the continued acceleration of the car.
If you've ever hit the speed limiter in an auto, you'll know what I mean. There's no "slingshoting" any faster. When speeds get up 100mph there is alot of resistance from the wind, and as soon as the speed limiter kicks in, you know it.tjm73 said:Actually this ability to continue gaining speed even after letting off is enhanced with an automatic. They, by design, store energy in the fliud within them and then distribute that energy in, for lack of a better term, a smoother way. Ever hit the gas in grandma's car and nothing happen's for a second or two? Well something is happening. Energy is being stored and it will be delivered even if you let off.
With a stick the engine is pysically connected to the transmission via the clutch as long as the clutch is engaged. When you let off, the engine adds a large ammount of immediate force slowing the car.
The car will continue to accerate until frictional forces overcome the stored energy and then the car will stop accerating completly and start to slow down.
tjm73 said:Then explain what other forces are causing the car to continue to gain some speed. Everyone is quick to discount my ideas, but no one has offered any other explainations.
tjm73 said:Well I say again....
Then please explain to me how my car continues to gain speed even after I have removed engine forces by depressing my clutch, disconecting forward motion providing power.
When I push the clutch in at 70 mph while accelerating hard, the car continues to gain some speed, all be it at a slower rate of gain and it continues to slowing rate. Yet it is still gaining speed. An additional 5-10mph is the norm.
And this is on flat, level ground.
That's very plausible, but I also noticed he's running a 75 shot, and hitting the speed limiter when your spraying....tjm73 said:Back to the original post. Another possibility is the 103mph could also be the speed measured on the track, while the 98 mph mentioned is the speed displayed on the speedometer. We all know how "accurate" the factory guages are.
tjm73 said:And I'm trying to figure out WTF is going on with my car?!?!? You can't argue with physics yet my car seems to do the impossible. So something else is going on.
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