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-   -   to physics nerds: false advertising in falling LEXUS ad?! (https://xoutpost.com/off-topic/lounge/26589-physics-nerds-false-advertising-falling-lexus-ad.html)

B&DCalgary 02-05-2007 01:34 AM
Quote:
Originally Posted by rayxi
What you are missing from your analysis is the drag coefficient and that fact that the car would reach terminal velocity rather than continue accelerating at 9.81 m/s2. I have no idea what the drag coefficient is of a car falling wheels first but I'm guessing the terminal velocity is <75m/s. So while it is possible it isn't all that impressive.
You're right. A car falling wheels first would produce a heck of a lot of drag and would hit its terminal velocity pretty quickly and would not be going particularly fast. I'm guessing it probably wouldn't even hit 100 mph, but that's just my guess.

X5Flyboy 02-05-2007 07:40 AM
Just another ad promoting driving that is illegal - I really hate those "closed course, professional driver" ads and those ads with the 4'8" model that make the vehicle seem huge

Wagner 02-05-2007 08:22 AM
OMG, I think your thinking a little too hard about the Lexus commercials :rofl:

blondboinsd 02-05-2007 12:42 PM
Quote:
Originally Posted by AzNMpower32
Toyota can't make good ads because their cars can't corner. If they tried to make an ad involving twisty roads, the cars would have to drive too slowly or else risk understeering into the next tree. Hence, your "straight line only" ads.

BMW used to make good ads before they switched agencies. I vaguely remember an ad where a guy walks into a BMW dealership, and starts daydreaming about the fun he'd have driving as the ad focuses on the 325i accelerating and driving on twisty roads. Ah, nothing pricks my ears like the sound of an inline 6.;)
Yeah I LOVED the new 3 series ad billboards that said "3 Cheers the ALL new 3 is here!"

My All Time Favorite Commercial for a BMW?

The WHOLE reason I bought an X5, the 2003 Commercial for the new 2004 X5 with X-Drive that had the 4 angels on it

I have to say Mercedes does the best commercials, I LOVE the SL500 commercial where it shows the whole history in generations of the SL

dkl 02-05-2007 12:44 PM
Quote:
Originally Posted by rayxi
What you are missing from your analysis is the drag coefficient and that fact that the car would reach terminal velocity rather than continue accelerating at 9.81 m/s2. I have no idea what the drag coefficient is of a car falling wheels first but I'm guessing the terminal velocity is <75m/s. So while it is possible it isn't all that impressive.
Plus, the car on the ground had a running start.

GUINNESS 02-05-2007 01:53 PM
Quote:
Originally Posted by AzNMpower32
Toyota can't make good ads because their cars can't corner. If they tried to make an ad involving twisty roads, the cars would have to drive too slowly or else risk understeering into the next tree. Hence, your "straight line only" ads.

BMW used to make good ads before they switched agencies. I vaguely remember an ad where a guy walks into a BMW dealership, and starts daydreaming about the fun he'd have driving as the ad focuses on the 325i accelerating and driving on twisty roads. Ah, nothing pricks my ears like the sound of an inline 6.;)

I forgot what that sounds like since I've been without my car since January 12 :(

xnsf 02-05-2007 01:59 PM
Quote:
Originally Posted by GUINNESS
I forgot what that sounds like since I've been without my car since January 12 :(
vacationing?

crosvs 02-05-2007 03:00 PM
yeah, i considered the drag factor but didn't think it would be THAT significant an issue here. I know terminal velocity for a person is something around 135 mph ... right? anyway ... hm. i'll check with my buddy who's a phd student at cal tech ... he can straighten this out once and for all :)

this is why i'm a lawyer and not a physicist :D

MrX30si 02-05-2007 03:10 PM
Quote:
Originally Posted by dkl
Plus, the car on the ground had a running start.
Yep, they let the ground car hit the start line (release point) at a pre-set velocity. Crazy though, If the heli was 20 ft too low at release. . :yikes:

crosvs 02-05-2007 04:34 PM
well in that case, if the laws of physics DID allow the stunt to be performed, i still wonder whether they really did it (in which case, WOW props to that ad agency!!) or whether it was just CG.


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