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Posted on 4/21/22 at 8:19 am to Ingeniero
A squared plus B squared equals frick the pythagorean theorem and something about 9.8 meters/second is the answer because the circumference is 3.14 while x=t squared minus cheerios.
Posted on 4/21/22 at 8:19 am to Ingeniero
It can’t be done
Posted on 4/21/22 at 8:20 am to Ingeniero
Posted on 4/21/22 at 8:21 am to Ingeniero
(no message)
This post was edited on 1/30/25 at 5:35 pm
Posted on 4/21/22 at 8:22 am to Ingeniero
4 8 15 16 23 42
Posted on 4/21/22 at 8:36 am to Ingeniero
Is this the thread where people google the answer then pretent they came to it organically in 30 seconds?
Posted on 4/21/22 at 8:36 am to Kcrad
I knew it was too damn easy. 
Posted on 4/21/22 at 8:42 am to Ingeniero
2 miles averaging 30 mph takes 4 minutes.
You spend 4 minutes to go 1 mile at 15 mph.
It’s not infinity, it’s impossible.
You spend 4 minutes to go 1 mile at 15 mph.
It’s not infinity, it’s impossible.
Posted on 4/21/22 at 8:47 am to Ingeniero
quote:
In words, an old car travels the 1 mile ascent at a speed of 15mph. The hill's descent is 1 mile long as well. How fast does the car have to travel on the descent to achieve an average speed of 30mph for the whole trip?
Was this supposed to be hard? Because I figured it out in less that 4 mins....
(Well, really Less that 30 seconds, but that doesn't make for a very punny joke...)
Posted on 4/21/22 at 8:48 am to Lonnie Utah
Here's another from the same site.
I found this one a little bit more challenging. (But I used to calculate speed and distance in my head all the time when I cycled.) It's still deceptively easy tho.
I found this one a little bit more challenging. (But I used to calculate speed and distance in my head all the time when I cycled.) It's still deceptively easy tho.
This post was edited on 4/21/22 at 8:51 am
Posted on 4/21/22 at 9:04 am to Lonnie Utah
They both weigh the same.
Posted on 4/21/22 at 9:15 am to chryso
quote:
It's impossible. To average 30 MPH you would have to do the drive in 4 minutes. It will take that long to get to the top so you would have to complete the downhill part instantly to make the average.
With that in mind, if you drive a mile averaging 15 mph (using average because no car goes 0-15, so accounting for acceleration phase) and the next mile at 45 mph, what is your average mph?
I’m assuming we can ignore the uphill and downhill since it has no bearing on the true speed. 15mph is 15 mph.
Posted on 4/21/22 at 9:22 am to Riseupfromtherubble
Enough people have said the correct answer that I can answer this for you
Let's call the time it takes to go up t1 and the time it takes to go down t2. t1 is obviously 4 minutes, since 15mph = 1 mile/t1, t1=1/15 or .066hrs repeating = 4 minutes.
For the descent at the "intuitive" (but wrong) answer, 45mph = 1 mile/t2. So T2 = 1/45 = .0222hrs repeating, or 1.33 minutes.
t1+t2=.0888hrs repeating, or roughly 5.33 minutes.
2 miles / .0888hrs = 22.5mph average
quote:
With that in mind, if you drive a mile averaging 15 mph (using average because no car goes 0-15, so accounting for acceleration phase) and the next mile at 45 mph, what is your average mph?
Let's call the time it takes to go up t1 and the time it takes to go down t2. t1 is obviously 4 minutes, since 15mph = 1 mile/t1, t1=1/15 or .066hrs repeating = 4 minutes.
For the descent at the "intuitive" (but wrong) answer, 45mph = 1 mile/t2. So T2 = 1/45 = .0222hrs repeating, or 1.33 minutes.
t1+t2=.0888hrs repeating, or roughly 5.33 minutes.
2 miles / .0888hrs = 22.5mph average
Posted on 4/21/22 at 9:29 am to Riseupfromtherubble
quote:
With that in mind, if you drive a mile averaging 15 mph (using average because no car goes 0-15, so accounting for acceleration phase) and the next mile at 45 mph, what is your average mph?
It takes 5.33333 minutes to complete the two miles (4 minutes up and 1.334 minutes down) or an average of 2.665 minutes a mile. 60 / 2.665 = 22.514073 miles per hour on average
This post was edited on 4/21/22 at 9:30 am
Posted on 4/21/22 at 9:31 am to Ingeniero
zero
No way that model T makes it to the top of the hill
No way that model T makes it to the top of the hill
Posted on 4/21/22 at 9:34 am to Vamos Brandonos
quote:
Infinity
basically this
It took 4 minutes to get to the top of the ascent. To average 30 mph over 2 miles would mean travelling 2 miles in 4 minutes total. So, it would have to be instantaneous.
So, infinity.
This post was edited on 4/21/22 at 9:38 am
Posted on 4/21/22 at 9:36 am to Lonnie Utah
I got way too deep into this one drawing triangles before I realized… the hypotenuse of my triangle had to be longer than the 40m of slack in the rope, but it couldn’t be longer because the length of the rope is only 80m. Then I realized the sin of that angle had to be 1, meaning the angle was 90, essentially the poles could not have any distance apart.
Then I googled it and realized I took 10 minutes drawing triangles when I could have just used common sense
Then I googled it and realized I took 10 minutes drawing triangles when I could have just used common sense
This post was edited on 4/21/22 at 9:38 am
Posted on 4/21/22 at 9:38 am to Not Cooper
Better than me. The first time i ever saw that one, I was digging around for the formulas of catenaries before I realized it
Posted on 4/21/22 at 9:38 am to Not Cooper
quote:
Then I googled it and realized I took 10 minutes drawing triangles when I could have just used common sense
My process was essentially the same as yours. I said it was deceptively easy.
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