Thread: Brain Twister #2
-
02-19-2013, 08:15 PM #1
Brain Twister #2
You are on an elevator going up at a constant rate of speed when a quarter falls out your pocket. Lovbyts sees this and observes it hitting the floor. How much quicker does it hit as compared to if the elevator were not going up.
Additional info:
the distance from your pocket to the floor of the elevator is 4 feet
the elevator is going up 32 feet per second
The quarter weighs 5.67 grams
It's 80 degrees in the elevator
zero humidity
and it's 3pm Eastern time
You are standing at the equator, and the rate of earth's rotation is 1040mph
If you have worked out the math and know the answer, hold off and let others get a chance. If you are not sure or are guessing, go ahead and give it a shot
Good luck!
---Roman
-
02-19-2013, 08:16 PM #2Originally Posted by Times Roman
-
02-19-2013, 08:17 PM #3
-
So is mine...
-
02-19-2013, 08:20 PM #5
The answer is: 6
-
02-19-2013, 08:21 PM #6"ARs Pork Eating Crusader"
- Join Date
- Sep 2012
- Location
- A world without islam!!!!
- Posts
- 7,092
Whats a quarter?
Im going to say 0
-
02-19-2013, 08:22 PM #7Originally Posted by austinite
-
02-19-2013, 08:23 PM #8
Now Lobyts would say it's a trick question, cuz aint no damn quarter falling out someone's pocket and hitting the ground before HE makes a grab for it....
.....but that's not the answer! =)
-
-
02-19-2013, 08:32 PM #10Originally Posted by ElectraMaddox
-
02-19-2013, 08:33 PM #11
-
02-19-2013, 08:34 PM #12
-
02-19-2013, 08:35 PM #13Banned
- Join Date
- Aug 2011
- Posts
- 5,332
..........
-
02-19-2013, 08:35 PM #14Originally Posted by Times Roman
-
02-19-2013, 08:37 PM #15
-
02-19-2013, 08:39 PM #16
-
02-19-2013, 08:42 PM #17
Einstein's equivalence principle.
I don't know the math but to the person in the elevator it appears to fall at the same rate and the math says differently.
My educated guess is: the observer will not notice a different rate of fall even though the fall rate changes. The instance from the quarter being stationary in pocket, albeit moving upwards at a constant rate, to falling and hitting the floor has such a small difference that the human eye would not detect a stray from a normal rate of fall
-
02-19-2013, 08:47 PM #18Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
-
02-19-2013, 08:49 PM #19
-
02-19-2013, 08:50 PM #20Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
-
02-19-2013, 08:51 PM #21Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
Incidentally, i dont know the mathematical answer, but i say that there is NO difference in the speed at which the quarter falls to the floor in a moving elevator.
-
02-19-2013, 08:52 PM #22
1/8th of a second faster.
-
02-19-2013, 08:56 PM #23Originally Posted by MickeyKnox
-
02-19-2013, 08:58 PM #24Originally Posted by MickeyKnox
-
02-19-2013, 09:00 PM #25Associate Member
- Join Date
- Sep 2012
- Location
- Canada
- Posts
- 278
Just a quick guess before I work out.
I am going to say that it would hit the ground at the same time.
Just because the elevator is moving, the distance between the elevator floor and the coin falling is constant. And the rate of gravity is constant.
Though, you may actually have to do math, but I'm not going to think about that right now lol.
-
02-19-2013, 09:01 PM #26Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
GGR,
It goes back to an old math question that was asked a loooong time ago by my brother. And i recall that the speed at which an elevator travels has little to no impact on you as the matter inside. Gravity is not affected. But i honestly dont know what the mathematical equation is to prove it.
He also asked this question, "If you were falling in an elevator and you knew exactly when it was going to hit the ground, could you not simply jump up real quick before impact and not be injured?" Its along the same lines.
-
02-19-2013, 09:01 PM #27Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
-
02-19-2013, 09:03 PM #28Originally Posted by MickeyKnox
-
02-19-2013, 09:15 PM #29
-
02-19-2013, 09:24 PM #30Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
-
02-19-2013, 09:25 PM #31Banned
- Join Date
- Dec 2011
- Location
- CANADA
- Posts
- 13,200
Its actually a trick question TR. Youre traveling the same speed of the elevator, but even if you "jump up" which you're actually NOT doing, you'll crash and die.
-
-
02-19-2013, 09:46 PM #33
Trick question
-
-
02-19-2013, 09:51 PM #35
-
Lol oops
-
02-19-2013, 09:54 PM #37
-
02-19-2013, 09:56 PM #38
It never reaches the floor because I catch it and put it into my pocket.
On another note anyone with a pocket that is 4 feet from the ground is pretty damn tall unless it's a short chest pocket.
-
-
02-19-2013, 10:32 PM #40Associate Member
- Join Date
- Sep 2012
- Location
- Canada
- Posts
- 278
When are you going to give us the right answer? I still think it's unchanged since essentially, the distance the coin has to travel, and gravity are the only thing that matters in this question, IMO. The weight of the coin doesn't matter because its dropping speed will remain the same whether it's 1 pound or 20 pounds.
The time/temp./earths rotation/ humidity/ elevators speed/ are all worthless and added info. to through us off.
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
SVT and steroids?
04-23-2024, 09:28 PM in ANABOLIC STEROIDS - QUESTIONS & ANSWERS