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Legal Help  335xi Acceleration Data


12202011, 05:35 PM  #1 
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Legal Help  335xi Acceleration Data
Hello,
I recently got a bogus charge that I am trying to defend. I need a reliable source for acceleration times and distances for my 2007 335xi. It is important that I show the impossibility of my vehicle accelerating to 42MPH in the short distance the policed claimed. It is easy to find 060 times, but I really need distances calculated. Any ideas? Last edited by Cory1970; 11252012 at 02:16 PM. 
12202011, 05:42 PM  #2 
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Well I've seen 335's with 06 in 3.2 seconds on a Vbox. That was an e90 335i....not sure about the Xi but I would assume it can do the same since it has more traction.
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12202011, 05:44 PM  #3 
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Stock 335i 045 in 3.3 seconds. XI probably similar.
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12202011, 05:45 PM  #4  
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Quote:
I had been driving half way down a very short city block when the police claimed I had accelerated to 42 MPH. 

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12202011, 05:51 PM  #5 
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Assuming constant acceleration during the voyage from 0 to 42 MPH, you would have needed to travel approximately 31m if it takes 3.3 seconds to get there.
I think. It's possible my math may be wrong. That's also assuming you can prove you were at a stop at the beginning of the block. Otherwise the point is moot. 
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12202011, 05:59 PM  #8 
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quick search on google found this hopefully this can give you some sort of idea
http://forums.corvetteforum.com/c6t...alculator.html
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12202011, 06:00 PM  #9  
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Quote:
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12202011, 06:13 PM  #11 
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i don't know how useful this is, good luck OP, even if you get convicted of doing 38mph, if the street limit was 35 you're just as guilty in the eyes of the court.
this by the way isn't accurate because acceleration isn't uniform. 
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12202011, 06:16 PM  #12 
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12202011, 06:38 PM  #13 
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You Must Be Kidding
Q. Is is possible to attain the speed of 42 mph from a dead stop within a single city block when driving a BMW 07 335xi?
A. Yes, your honor. You: Profuse sweat. Verdict: Fail.
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12202011, 06:50 PM  #14 
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Just do what I do. Pay the ticket and every time you see them on the side of the road call them a f@g when you drive by. They never chase you and it just feels great.

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12202011, 07:03 PM  #15 
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my 2c  Don't try to bring specs or physics to court, that's just going to piss the judge off. All that matters is how fast the cop thinks you were going.
Hire a lawyer who knows that court. Good luck.
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12202011, 07:09 PM  #16 
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The only possible situation I can see 42 as being the end of the world is possibly in a school zone. I did 52 in a 25 and my first impulse was not to hire a lawyer, nor deny it. I did it. The question was how do I not get a 40% insurance surcharge which costs much more than the ticket for the next 3 years.

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12202011, 07:11 PM  #17 
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12202011, 07:12 PM  #18 
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I think there was a case Fico v. Commonwealth where the accused combined his credit score and a metabolic panel to prove unequivocally that he was not fit to travel at the rate he was accused. There are so many ways to duck a question like that. That's what makes this the greatest nation on earth, it doesn't even matter.

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12202011, 08:17 PM  #19  
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Acceleration = F/m, where F is the net force applied to a mass, m. a=f/m, acceleration in terms of velocity. a = v  u/t Delta Velocity divided by Time. A = ΔV ÷ T Acceleration is worked out by (final speed  initial speed)/ time taken for change in speed a = v2v1/ t2t1 Strictly you should say velocity ie the speed in a certain direction. Youalso have the formula f=ma which tells you that the force needed to get something moving will be the mass of the object multiplied by the accelertion you want to achieve; so from this formula if you know force and mass you can work out acceleration. The formula for acceleration is: Vf(Vi)/t ie. change in velocity per unit time. Instantaneous acceleration in its differential form is d2x/dt2 where x is a function of time t. Acceleration is the time rate of change of velocity. That is, acceleration =dv/dt (v  velocity ; t  time) Or simply acceleration = change in velocity / time Read more: http://wiki.answers.com/Q/What_is_th...#ixzz1h7iiSywL 

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12202011, 09:04 PM  #20 
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Thanks for all the great information. I will be taking some street measurements tomorrow. Lucky there is video evidence showing a start and end point of acceleration. This will make it much easier to show a point of reference.
I will try to make a diagram and post it up. Thanks 
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12202011, 09:18 PM  #21 
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You can come up with all the data you want, but it will depend on you starting from a stop.
You: your honor, it is physically impossible for me to attain that speed from a stop in that distance. Cop: maybe you ran the stop sign, say what you want, but you were going that fast. Judge: guilty 
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12212011, 12:29 AM  #22 
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If they got you on radar or laser, you're gone unless you can succesfully challenge the unit calibration, officer training, or something like that. If it's critical, get a lawyer. They don't have to prove it's "possible" for you to have reached that speed. They just have to show evidence (which they presumably have) that you were clocked at 42. End of discussion.
Absent some problem with equipment, you CAN'T prove it's impossible, the evidence contradicts you. 
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