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Physicist Uses Math to Beat Traffic Ticket

physicscentral.com

21–30 of 73 posts

Re: Physicist Uses Math to Beat Traffic Ticket

#21
post #5

Haha, nice way to beat the system. But I doubt the symmetry of those two graphs. Surely, there is no (ordinary) retail car on the planet which can accelerate as fast as it decelerates?

First, we assume a spherical car...

Ah, the perfect physics world. It's a fun place to go from time to time.

Re: Physicist Uses Math to Beat Traffic Ticket

#23
post #5

Haha, nice way to beat the system. But I doubt the symmetry of those two graphs. Surely, there is no (ordinary) retail car on the planet which can accelerate as fast as it decelerates?

MechE here, the limiting factor for car accelerations is usually the static coefficient of friction between the car tires and the road, _not_ the power of the brakes or strength of the engine. Without ABS braking, it is quite easy to "skid" while applying a harsh brake because you overcome the limit of force between the tires and the road. Similarly, it is quite easy to "burnout" as well with a strong engine for the…

The limiting factor on acceleration in the Toyota Yaris is ont the tires.

Re: Physicist Uses Math to Beat Traffic Ticket

#24

Yeah, that took some dedication, and because we aren't all as dedicated or physicist here are some practical tips I've learned: 1. When an officer asks how fast you were going, never say anything over the speed limit or that's automatic guilt. Just decline to know or tell. A lot of people say within a +5-10mph range over the speed limit because they think that is "ok", but in fact anything over the speed limit is spe…

> in fact anything over the speed limit is speeding and is ticket worthy.

This actually varies per jurisdiction, though that's still a good general rule. In Florida, for example, you can't be ticketed for 1-4mph over the limit thanks to a law that was passed to eliminate speed traps.

Re: Physicist Uses Math to Beat Traffic Ticket

#25
post #6

> or maybe he was simply impressed by the sheer dedication Krioukov put into avoiding this ticket. This seems more likely. I beat a speeding ticket with GPS data once - except the judge didn't even ask to see the data. I just said I had it. (Yes, the officer was there in court too.) The judge said he'd take my word for it.

My friend always appears in court after getting speeding tickets because it is apparently more costly for the court to pay for the session and the officer's time than what they will get from a ticket, so they usually dismiss it to save money. Sometimes the officers don't even show up. He has told me it works every time.

If everybody would choose to appear in court like your friend does, perhaps this law that most people don't follow would actually get changed. Instead most people just pay the ticket and continue to allow the law to "work" as it is.

Re: Physicist Uses Math to Beat Traffic Ticket

#26
I had a similar story. I once sped through a traffic intersection and a cop car coming from the other way perpendicular to my heading. He turned immediately and chased me down. After stopping, he ordered me out and said I was doing 110mph. I was like there's no fucking way I was doing 110. The car felt very different going 110 than 60. He was saying I looked like going very fast. The only thing that ran through my mind was to get a lawyer. Amazingly he left me go after lectured me for a while. I guessed he wasn't sure exactly how fast I went.

I was wondering how can he misjudge the speed so far apart. This article explained the phonomena.

Re: Physicist Uses Math to Beat Traffic Ticket

#27

Yeah, that took some dedication, and because we aren't all as dedicated or physicist here are some practical tips I've learned: 1. When an officer asks how fast you were going, never say anything over the speed limit or that's automatic guilt. Just decline to know or tell. A lot of people say within a +5-10mph range over the speed limit because they think that is "ok", but in fact anything over the speed limit is spe…

the officer was so aggravated he forgot to wear his hat when he got out of his car and the case got dismissed because of it

That really sounds like an urban myth.

Re: Physicist Uses Math to Beat Traffic Ticket

#28

Yeah, that took some dedication, and because we aren't all as dedicated or physicist here are some practical tips I've learned: 1. When an officer asks how fast you were going, never say anything over the speed limit or that's automatic guilt. Just decline to know or tell. A lot of people say within a +5-10mph range over the speed limit because they think that is "ok", but in fact anything over the speed limit is spe…

the officer was so aggravated he forgot to wear his hat when he got out of his car and the case got dismissed because of it That really sounds like an urban myth.

It's possible (though I haven't done any research) that the law may require a uniformed officer to make the stop and the hat is part of the uniform. No hat -> not uniformed -> not a legal stop.

Re: Physicist Uses Math to Beat Traffic Ticket

#29

Yeah, that took some dedication, and because we aren't all as dedicated or physicist here are some practical tips I've learned: 1. When an officer asks how fast you were going, never say anything over the speed limit or that's automatic guilt. Just decline to know or tell. A lot of people say within a +5-10mph range over the speed limit because they think that is "ok", but in fact anything over the speed limit is spe…

the officer was so aggravated he forgot to wear his hat when he got out of his car and the case got dismissed because of it That really sounds like an urban myth.

This is interesting actually. I kind of "took his word for it" and never put too much thought into it. After about 20+ minutes of Googling I have yet to find a definitive answer. I guess it just depends on jurisdiction. I'm not sure if I would have the guts to say, "Judge Officer here wasn't wearing his hat when he gave me this ticket." So I don't know, I read a few things that supported it and a few that didn't. I should ask my director friend if it's true. Ha

Re: Physicist Uses Math to Beat Traffic Ticket

#30

Earlier quoted context omitted.

the officer was so aggravated he forgot to wear his hat when he got out of his car and the case got dismissed because of it That really sounds like an urban myth.

It's possible (though I haven't done any research) that the law may require a uniformed officer to make the stop and the hat is part of the uniform. No hat -> not uniformed -> not a legal stop.

Yes, that's the only explanation which would make any sense -- but it seems like a rather extraordinary combination of legislators and judge would be required to (a) write the law that way and (b) interpret a law so literally as to throw out a ticket over a missing hat.
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