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That being said, I don't even look at 0-60 times anymore. They just are not meaningful. 1/4 mile times are much more informative as they have both the ET and trap speed, and cover a broader range of speeds. Plus 0-60 times are too dependant on traction.
one of three Newton rules of action and reaction. F=Ma. force = mass x accelerationOriginally Posted by brandon1978
That logic is flawed. The car is still increasing its speed during the shift due to momentum, it is just the rate of speed increase that declines. A .5 second shift does not add .5 seconds to the 0-60 time.That being said, I don't even look at 0-60 times anymore. They just are not meaningful. 1/4 mile times are much more informative as they have both the ET and trap speed, and cover a broader range of speeds. Plus 0-60 times are too dependant on traction.
A mass will not accelerate without application of force. Momentum, without friction, will allow a mass to continue its motion at the same velocity. So if it takes .5 seconds to shift, the car will not accelerate during this time but will continue to travel at the same speed (but decreasing speed due to resistance) before the shift.
Regardless... a .5 second shift will affect the 0-60 time. Time does not stop while your are shifting gears!
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Based on this logic, the 05 will probably have a faster 0-100K/h time; not 0-60 mph, since both are still in 2dn gear at 60 mph. Unless the gear ratio changed between 04 and 05, the higher rev limit of the 05 can probably hit 100K/h in second gear. This being said, is the 05 faster because of this? Yes, if you stop the race at 100K/h.Originally Posted by mephistomyhero
Based on this logic, doesn't this say that the 05 is faster 0-60 then the 03-04? The 05 has a higher redline (shiftpoint, right?) so it can go longer without shifting then the 03-04? Of course, we all know the 03-04 and 05-06 are pretty much the same (ok, let's not start which is better). I'm guessing this is why cars with higher redlines are quoted with better 0-60 times.
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Well, the original poster said he had to shift before 60 so that's why I was asking about the 0-60 numbers only Originally Posted by g35pat
Based on this logic, the 05 will probably have a faster 0-100K/h time; not 0-60 mph, since both are still in 2dn gear at 60 mph. Unless the gear ratio changed between 04 and 05, the higher rev limit of the 05 can probably hit 100K/h in second gear. This being said, is the 05 faster because of this? Yes, if you stop the race at 100K/h.
Like I said, it really doesn't matter between the two models, in the end ... just the mier fact that almost all of our cars are modded one way or another. Hell, just having an extra Amp, some groceries, and your dry cleaning will make a difference :-) Like one guy or gal said, even traction plays a role. So, I do think 0-60 times is in the mind of the marketing department then anyone else.Quote:
A mass will not accelerate without application of force. Momentum, without friction, will allow a mass to continue its motion at the same velocity. So if it takes .5 seconds to shift, the car will not accelerate during this time but will continue to travel at the same speed (but decreasing speed due to resistance) before the shift.
Regardless... a .5 second shift will affect the 0-60 time. Time does not stop while your are shifting gears!
Originally Posted by clinty
one of three Newton rules of action and reaction. F=Ma. force = mass x accelerationA mass will not accelerate without application of force. Momentum, without friction, will allow a mass to continue its motion at the same velocity. So if it takes .5 seconds to shift, the car will not accelerate during this time but will continue to travel at the same speed (but decreasing speed due to resistance) before the shift.
Regardless... a .5 second shift will affect the 0-60 time. Time does not stop while your are shifting gears!
very nice lol. thanks to Newton
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A mass will not accelerate without application of force. Momentum, without friction, will allow a mass to continue its motion at the same velocity. So if it takes .5 seconds to shift, the car will not accelerate during this time but will continue to travel at the same speed (but decreasing speed due to resistance) before the shift.
Regardless... a .5 second shift will affect the 0-60 time. Time does not stop while your are shifting gears!
funny i have a physics test relevant to momentum tomorrow. haha, good post.Originally Posted by clinty
one of three Newton rules of action and reaction. F=Ma. force = mass x accelerationA mass will not accelerate without application of force. Momentum, without friction, will allow a mass to continue its motion at the same velocity. So if it takes .5 seconds to shift, the car will not accelerate during this time but will continue to travel at the same speed (but decreasing speed due to resistance) before the shift.
Regardless... a .5 second shift will affect the 0-60 time. Time does not stop while your are shifting gears!
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Just remember P=MV Originally Posted by mrjonang
funny i have a physics test relevant to momentum tomorrow. haha, good post.
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I'm pretty sure with my 04 I have to hit 3rd right before 60mph. Then again I could be wrong since I don't exactly stare at the speedometer if I am accelerating like that.Originally Posted by g35pat
Based on this logic, the 05 will probably have a faster 0-100K/h time; not 0-60 mph, since both are still in 2dn gear at 60 mph. Unless the gear ratio changed between 04 and 05, the higher rev limit of the 05 can probably hit 100K/h in second gear. This being said, is the 05 faster because of this? Yes, if you stop the race at 100K/h.
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Acceleration is the rate of change of speed. Even if the acceleration graph is flat (flat indicates zero acceleration), that would mean the car is staying the same speed! It takes time for the acceleration to go from positive to negative. Originally Posted by sofl_g
I beg to differ, the milisecond that the engine is disconnected form the drive wheels, the car is coasting and if anything, decreasing speed. Look at plots of acceleration done with ACCURATE accelerometers, the plots go flat or just slightly below flat the milisecond second the clutch disconnects the engine from driveline.
I first thought about this on my old bike. 2nd gear redlines in the low 90s, but in the time that it took to shift from 2nd to 3rd, I would be traveling over 100.
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I first thought about this on my old bike. 2nd gear redlines in the low 90s, but in the time that it took to shift from 2nd to 3rd, I would be traveling over 100.
with the older speedos the actual speed reading is delayed when you are accelerating hard. IE you are travelling faster than the speedo says! Originally Posted by brandon1978
Acceleration is the rate of change of speed. Even if the acceleration graph is flat (flat indicates zero acceleration), that would mean the car is staying the same speed! It takes time for the acceleration to go from positive to negative. I first thought about this on my old bike. 2nd gear redlines in the low 90s, but in the time that it took to shift from 2nd to 3rd, I would be traveling over 100.
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I first thought about this on my old bike. 2nd gear redlines in the low 90s, but in the time that it took to shift from 2nd to 3rd, I would be traveling over 100.
When you shift, in that split second you are no longer accelerating. Friction and air resistance will immediately start slowing down your car. This is simple physics. The fact that you cannot physically tell at that time doesn't change the laws of physics.Originally Posted by brandon1978
Acceleration is the rate of change of speed. Even if the acceleration graph is flat (flat indicates zero acceleration), that would mean the car is staying the same speed! It takes time for the acceleration to go from positive to negative. I first thought about this on my old bike. 2nd gear redlines in the low 90s, but in the time that it took to shift from 2nd to 3rd, I would be traveling over 100.