|
Understanding through Discussion |
|
QuickSearch
|
|
| |||||||
| Chatting now: | Chat room empty | ||||||
| letchimWOD | |||||||
|
| Thread ▼ Details |
|
|
| Author | Topic: Counter-Intuitive Science | ||||||||||||||||||||
|
Catholic Scientist Member  Posts: 7899 From: near St. Louis Joined: Member Rating: 9.6 |
Because it employed an optical sensor and not a pressure one.
| ||||||||||||||||||||
|
Catholic Scientist Member Posts: 7899 From: near St. Louis Joined: Member Rating: 9.6 |
Not if he's standing on ice... There's gonna be a horizontal component to the force that the friction between his feet and the ground will have to overcome.
| ||||||||||||||||||||
|
Dr Adequate Member  Posts: 11070 Joined: Member Rating: 9.1 |
Obviously I'd have been wrong if I'd been wrong about how the door worked. But I'd also have been wrong if I'd been right about how the door worked (which I was).
| ||||||||||||||||||||
|
slevesque Member (Idle past 589 days)  Posts: 1456 Joined: |
I never do well with these kind of questions: I think it could have at the moment you jump, since you are pushing on the ground to get yourself a vertical, upward acceleration. Couldn't when you came down since the only force in play is your weight (and the normal force of the ground)
| ||||||||||||||||||||
|
dwise1 Member  Posts: 1935 Joined: Member Rating: 9.2 |
I believe that motion detectors are much more common nowadays than pressure pads, which I don't think I've even seen since my childhood 40 years ago. Assuming that it requires detecting motion towards it, jumping vertically would not involve any motion towards it and so should not trigger it. As for why it didn't detect your initial approach, I don't know, unless you arrived in some time interval when it's designed to not look, such as when it has opened for someone, at which time a different sensor would keep it from closing until after the last person had entered. Did you approach from a highly oblique angle? Though when I do that to a door, it still detects me. Many even detect me walking past; must be my electro-magnetic personality.
| ||||||||||||||||||||
|
Iblis Member (Idle past 331 days) Posts: 627 Joined: |
Calling this pressure "weight" shouldn't make any difference. Standard scales, the spring and lever kind for example, veer up all out of proportion when you jump on them. Some sort of stable mass-register, might not, but, what in the world ... my imagination starts to fail me at this point. Give.
| ||||||||||||||||||||
|
ringo Member  Posts: 7611 From: Stubblejump, Canuckistan Joined: Member Rating: 9.5 |
Yes, it becomes a complex vector problem with no easy intutitve answers. "I'm Rory Bellows, I tell you! And I got a lot of corroborating evidence... over here... by the throttle!"
| ||||||||||||||||||||
|
Catholic Scientist Member Posts: 7899 From: near St. Louis Joined: Member Rating: 9.6 |
Just create a free body diagram in your head
| ||||||||||||||||||||
|
ringo Member Posts: 7611 From: Stubblejump, Canuckistan Joined: Member Rating: 9.5 |
Yes, the first step is to recognize that you need to analyze the problem, not just jump to the "obvious" conclusion that the stronger man wins. "I'm Rory Bellows, I tell you! And I got a lot of corroborating evidence... over here... by the throttle!"
| ||||||||||||||||||||
|
CosmicChimp Member  Posts: 294 From: Muenchen Bayern Deutschland Joined: |
Could it be that the sensor was aiming at the other side of the sliding doors? Was it that you were using the doors but not in the proper direction; an entrance for an exit or vice versa?
| ||||||||||||||||||||
|
jar Member  Posts: 23388 From: Texas!! Joined: Member Rating: 6.9 |
Anyone so limited that they can only spell a word one way is severely handicapped!
| ||||||||||||||||||||
|
Catholic Scientist Member Posts: 7899 From: near St. Louis Joined: Member Rating: 9.6 |
I thought the "obvious" conclusion was that the heavier man wins... The marine *could* lift him if he could walk backwards with the rope and pulled at an angle.
| ||||||||||||||||||||
|
RAZD Member  Posts: 14335 From: the other end of the sidewalk Joined: Member Rating: 10.0 |
there is a green blob ... or is it the green goblin? http://news.sciencemag.org/...confirms-nature-of-myster.html Enjoy by our ability to understand Rebel American Zen Deist ... to learn ... to think ... to live ... to laugh ... to share. Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)
| ||||||||||||||||||||
|
ringo Member Posts: 7611 From: Stubblejump, Canuckistan Joined: Member Rating: 9.5 |
I've actually done the experiment with a little guy who thought he was stronger than me. "I'm Rory Bellows, I tell you! And I got a lot of corroborating evidence... over here... by the throttle!"
| ||||||||||||||||||||
|
RAZD Member Posts: 14335 From: the other end of the sidewalk Joined: Member Rating: 10.0 |
Enjoy by our ability to understand Rebel American Zen Deist ... to learn ... to think ... to live ... to laugh ... to share. Join the effort to solve medical problems, AIDS/HIV, Cancer and more with Team EvC! (click)
| ||||||||||||||||||||
|
|
Copyright 2001-2013 by EvC Forum, All Rights Reserved
™ Version 4.0 Beta
Innovative software from Qwixotic © 2013
