Thread: drag racing facts

Tweet

I can respect your wish for annomy? I am not one to stand on a soap box and beat my chest either---however I cannot stand by and let a idea get exponded on that is wrong. I know that what you were trying to say was an answer to that post that has been out about the numbers on a top fueler---but what you wrote took it in the wrong direction--You have my email, I'd like to meet you sometime--if you get up to Rt 66 for the race let me know your coming.

Jerry

Since I haven't commented . . .

Assuming that an engine turns a constant 7200 RPM for 4.5 seconds, it will make exactly 540 revolutions. (7200/60) x 4.5 = 540. We all know those assumptions are silly for a TFD, but under those assumptions, that math is correct.

As for dividing 7200 by 4.5, that math has no meaning. If you look at the units (dimensional analysis), they are Revs/minute. If you divide that by 4.5 seconds, the final units would revs per minute-second, which doesn't represent anything in particular.

wow! i am glad that i finally started a thread that has gotten so much discussion. I am learning so much.

hey barb,

Good discussion starter but we're just arguing the minutia... nothing terribly relevant... the main point is you can't always believe everything you read on the internet while some facts seem plausible, the reality is usually more complex.... thanks for getting the ball rolling though.

-chris

hubby has posed a question. The corvette is traveling 200 mph when he passes the tree. what is his time in the quarter. in other words how long does it take to run a 1/4 mile if you are traveling at 200 mph at the start. as you can tell math is not my strong suit.

4.5 sec

(.25 mi / 200 mi/hr) * 60 min/hr * 60 sec/min

Looks like a tie, huh?

Originally Posted by jyardgirl

hubby has posed a question. The corvette is traveling 200 mph when he passes the tree. what is his time in the quarter. in other words how long does it take to run a 1/4 mile if you are traveling at 200 mph at the start. as you can tell math is not my strong suit.

Is he holding that same speed for the length of the track, or is he accelerating? It IS a drag strip, right? I'll assume he means running a constant speed.



If he is running 200MPH, that would be "200 miles per hour".

which would be the same as "800 1/4 miles per 3600 seconds"

Divide the 800 1/4 miles into the 3600 seconds...

...and you get 4.5 seconds

Originally Posted by nitrowarrior

I don't throw my name out there because I am not your John force or Coniie kalitta type of guy. I run in the background making things come together. Never havebeen one to stand on a soap box and thump my chest yelling "Look at me"......so many guys are in the trenches who get no fame or glory. WIn lose or draw. They are more deserving than I.

John ,Ha ha he is a punk,lol, Just kidding! I know exactly where your coming from. The guys that were pushing nitro when it was the unknown ,NOW those guys are some BAD M F ers, big lack of a better term. Also it is unfortunate that the people that make them cars break and set new records dont get much attention, all thats seen is the guy stepping on the peddle.

Originally Posted by DennyW

4.5 sec !! Hey, that means he's pulling 7200 rpm's.

I'll resist the urge to post exactly what comes to mind here, Denny

My crass and terse response would have the initials of Ford and Oldsmobile...

Crass is crass (crude, vulgar?) (as in F O) and terse is short, concise, to the point, (as in two letters F O)...

No offense intended that was just my knee jerk response to your obviously jesting post...

This equation is about all you need. . .

x(t) = 1/2 at2 + vot+ xo

Skids has seen it before.

Originally Posted by Henry Rifle

This equation is about all you need. . .

x(t) = 1/2 at2 + vot+ xo

Skids has seen it before.

Yup... physics 101... good lead-in to diffy-Q... at my going rate for accuracy I'd probably end up throwing a random decimal place in there somewhere

Okay, Denny... I think you need to keep your pie smooching to yourself or at least just your roommates