Need help from math guru for acceleration info to beat ticket

[ez at nova]

Re: Re: Need help from math guru for acceleration info to beat ticket

Originally posted by bruce
From some old software, as I recall a 2.0 60' time would put you at well over 30 MPH.
40 in a jeep at moderate throttle for 110' would sound easy.

Was she speeding?.
If so then why not admit to it?.

There's a bit of a difference in acceleration between a 2 second brake torqued, traction enhanced 2 second 60 ft acceleration run and a woman who never speeds in a jeep with all-terains pulling away slow from a stop sign in a 25 mph tiny town where stop signs are literally 250 feet apart if that. In a vehicle that takes over 10 seconds to get to 60, trust me, 43 in 110' is not easy

 

[ez at nova]

IMPORTANT - NEW INFO

I found out that there is also details of time on the ticket! it says 1.765 seconds. We know that it is for 110 feet. This equates to a velocity of 42.9 mph... so I guess this is AVERAGE mph?? Knowing this, and factoring in that this wa measured FROM A STOP SIGN at the beginning of the measurement...I think this one might score up as: innocent people > 1 -- Smokey doing something much less important than he should be doing > 0

 

[BlownZ]

I think you are likely in for a rude awakening. If you have ever fought a ticket in court (despite all of the internet attorneys that have) you rarely win.

I would think that the time and distance is not being measured from the dead stop but maybe after she was already rolling giving the average speed of 43 mph. From a dead stop the vehicle simply could not possibly achieve 110 feet in 1.7 seconds...and even though you would hope that this LEO was so far off in his calculations I don't think you are going to find it to be the case. I am sure they are much better trained than this to be so far off. Good luck though.

 

[AirBuick]

Ez:

0-60 in 10 seconds and 0-43 in 1.765 seconds? Doesn't this seem a little off? If the cop claims this was terminal velocity at the 110 ft mark, then we're supposed to accept that the vehicle then can take an additional 8.235 seconds to reach 60 mph? Yeah, right. Does your state accept readings from that device to be a basis to isuue traffic citations?

 

[ez at nova]

Originally posted by AirBuick
Ez:

0-60 in 10 seconds and 0-43 in 1.765 seconds? Doesn't this seem a little off? If the cop claims this was terminal velocity at the 110 ft mark, then we're supposed to accept that the vehicle then can take an additional 8.235 seconds to reach 60 mph? Yeah, right. Does your state accept readings from that device to be a basis to isuue traffic citations?

That's a good question, about the validity of Robic as a basis for citations. I'm sure it is legit, but it's worth a check. I wonder where I can find that out?
A far as the acceleration, you're right, it seems highly unlikely! The thing I have to measure and double check is, how far 110 feet could be from the stop sign (ie, how much of a "rolling start" the Jeep would have had before the 110 feet may have started...it can't be much at all though!)

 

[BLACK6PACK]

I have to dissagree with blown z. Most courts don't want to clog up the system with traffic tickets and are very willing to cut deals. I've fought 4 tickets and have yet to "lose". Every time I've gone I've ended up with "no points" and a small court cost, usually around $35. Thats not bad considering that the tickets averaged around $150 a piece.

 

[Buick From Hell]

40 mph in 110' is a TALL order, even for a "performance" car...

step off 110' feet anyplace there's room, and try it, ESPECIALLY under "normal driving" conditions...you will most likely find that you'll be needing to refine your launching techniques...

 

[ez at nova]

One thing I just learned refreshing my mind with high school physics is that although he probably used a simple V=D/T formula that gives average velocity over the 110 feet, given that it was only for 1.76 seconds makes this formula SOMEWHAT close to an instantaneous velocity. Granted, it's still off, since there is moderate acceleration involved, and it is not as close to instantaneous velocity as, say, a simple v=d/t for 2 seconds of a skydiver mid-fall which involves much higher speeds and less acceleration, but still, the cop could argue that this is close enough to an instantaneous velocity. So, as we've said before, my job now I guess is to prove that within the 110 feet from the stop sign, the Jeep could be no where near 43 mph.