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Author Topic: random facts of the day  (Read 3866 times)

vh

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random facts of the day
« on: November 08, 2013, 08:13:22 PM »

a ball placed on a tautochrome curve and acted on by uniform gravity will reach the bottom in the same amount of time no matter the starting point


a brachistochrone curve will carry a ball acted upon by uniform gravity from point a to b in the shortest amount of time.


blotz

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Re: random facts of the day
« Reply #1 on: November 09, 2013, 06:57:51 AM »
What if the  ball is already at the end?

clockworks

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Re: random facts of the day
« Reply #2 on: November 09, 2013, 09:51:23 AM »
a new ligament has been discovered in the knee

Darvince

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Re: random facts of the day
« Reply #3 on: November 09, 2013, 01:39:14 PM »
What if the  ball is already at the end?
it will not move

blotz

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Re: random facts of the day
« Reply #4 on: November 09, 2013, 04:15:53 PM »
but it's already there

Bla

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Re: random facts of the day
« Reply #5 on: November 11, 2013, 01:58:21 AM »

tuto99

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Re: random facts of the day
« Reply #6 on: November 11, 2013, 10:42:36 AM »
What if the  ball is already at the end?
Good point. If the ball is at the endpoint on that curve, it wouldn't move at all, contradicting what vh said.

FiahOwl

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Re: random facts of the day
« Reply #7 on: November 11, 2013, 11:18:54 AM »

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« Last Edit: March 22, 2021, 01:28:01 AM by FiahOwl »

tuto99

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Re: random facts of the day
« Reply #8 on: November 11, 2013, 11:32:30 AM »
if you're at the bottom and not moving then technically you never started moving at all therefor you never moved and you don't apply to the curve
>.> You are just curving away from the fact that if you are at the bottom of the curve, THEN IT IS STILL ON THE CURVE.

Quote
a ball placed on a tautochrome curve and acted on by uniform gravity will reach the bottom in the same amount of time no matter the starting point
If the starting point was on the end of the curve, it's still on the curve. There is not a statement implying the ball has to move.

vh

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Re: random facts of the day
« Reply #9 on: November 11, 2013, 12:46:37 PM »
about the tautochrome curve:

a point placed on the open interval (a,b) of a tautochrome curve where a is the start and b is  the end of the curve will take time t to travel to the end when acted upon by uniform gravity where t is constant.

---

http://en.wikipedia.org/wiki/Weierstrass_function

this function is continuous at every point, but differential at none

Bla

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Re: random facts of the day
« Reply #10 on: November 13, 2013, 03:40:33 AM »
Municipal tax rates in Denmark

vh

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Re: random facts of the day
« Reply #11 on: November 13, 2013, 04:47:36 AM »
i read municipal as munichpal

atomic7732

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Re: random facts of the day
« Reply #12 on: November 13, 2013, 06:36:37 AM »
munchable tax rates