AChat Forum

Off-Topic => Quizz, Fav TV, Fav Music, Fav Films, Books... => Topic started by: AusWoody on April 01, 2015, 04:52:10 AM

Title: how do you? interesting thoughts and problems!
Post by: AusWoody on April 01, 2015, 04:52:10 AM

I was given a puzzle today, a friend wanted to know how fast a stock 1986 auto  corvette would go in top gear  at 3000 rpm and inversly what revs would be required  to do 140 mph.

So firstly we had to define the specifications of the vehicle located here
Http://auto.howstuffworks.com/1986-corvette1.htm

Then we need to know more info on the wheel tyre package
Http://www.1010tires.com/tools/tire-size-calculator/205-75r15/235-70r15/225-65r16/235-60r16

Given that the stock specs  for an 4spd  auto 86 vette are:-

2.59:1 (auto) 3.07:1 (manual)
Tyre  225/60 vr 16 =  revs per mile:  755.93

shall we start?

Lets start with the vehicle speed @ 3000 rpm

@ 3000 rpm/ 2.59 = wheel rotation =  1158.30

1158.30 / 755.93 = 1.53 miles / minute
1.53 x 60 = 91.93 MPH

( assume it has the manual  diff @3.07  / 3.07 = 977.20  / 755.93 =  1.30 mpm  x 60 = 77.56 mph)
pretty simple  right?

Ok lets go the other way

140 x 755.93 = 105830.2 / hr

105830.2 x 2.59 = 274100.218 rph

274100.218 / 60 = 4568.34 rpm

now there is some dispute regarding my calculations based on my extensive  knowledge of mechanical physics and maths  so have an opinion and  speak up  :)

Title: Re: how do you? interesting thoughts and problems!
Post by: tangoracer on April 14, 2015, 01:50:37 PM

Woody  :) 

The only problem I can see with your Math  is     ;D  A 1986 Corvette wouldn't do 140 mph

Title: Re: how do you? interesting thoughts and problems!
Post by: Stone on April 15, 2015, 12:59:09 PM

Here  ;D

After much scribbling

(http://shirtminion.com/wp-content/uploads/2014/10/42-the-answer-to-life-the-universe-and-everything-440x330.jpg)

I got it  ...

(http://sd.keepcalm-o-matic.co.uk/i/the-answer-to-life-the-universe-everything-is-42.png)

(http://www.reactiongifs.com/r/tda.gif)

Title: Re: how do you? interesting thoughts and problems!
Post by: AusWoody on April 15, 2015, 01:53:59 PM

Quote from: Stone on April 15, 2015, 12:59:09 PM

Here  ;D

After much scribbling

(http://shirtminion.com/wp-content/uploads/2014/10/42-the-answer-to-life-the-universe-and-everything-440x330.jpg)

I got it  ...

(http://sd.keepcalm-o-matic.co.uk/i/the-answer-to-life-the-universe-everything-is-42.png)

(http://www.reactiongifs.com/r/tda.gif)

lol  do you even understand that?

Title: Re: how do you? interesting thoughts and problems!
Post by: Lover on April 15, 2015, 03:38:03 PM

lol woody, watch "The Hitchhiker's Guide to the Galaxy" ;)

Title: Re: how do you? interesting thoughts and problems!
Post by: AusWoody on April 15, 2015, 05:24:56 PM

read the books, seen the series  and watched the movie mate  lol

actually i was referring to the math on the chalkboard  :D   :P

Title: Re: how do you? interesting thoughts and problems!
Post by: Stone on April 16, 2015, 12:15:22 PM

Of course,  I'm excellent at Maths and solving problems.

(http://cdn.meme.am/instances/47802871.jpg)

Are you?

Title: Re: how do you? interesting thoughts and problems!
Post by: AusWoody on April 16, 2015, 03:02:07 PM

a lot more times than 45  goes into 16  lol

(http://stickerish.com/wp-content/uploads/2011/09/SexisFunBlackSS-1024x463.png)

Title: Re: how do you? interesting thoughts and problems!
Post by: LovingSir on April 16, 2015, 04:51:57 PM

16 into 45?

As many times as she allows.   :o :o

Title: Re: how do you? interesting thoughts and problems!
Post by: Kaitlyn72 on April 17, 2015, 07:23:25 AM

Quote from: tangoracer on April 14, 2015, 01:50:37 PM

Woody  :) 

The only problem I can see with your Math  is     ;D  A 1986 Corvette wouldn't do 140 mph

That is incorrect Tango. :)  I hope you are joking.