Simple Machines B/Compound Machines C

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Re: Simple Machines B/Compound Machines C

Postby Unome » March 31st, 2015, 4:39 am

What kind of accuracies and times are people getting in the build portion? We've been taking about a minute for ~3% error. Hard to tell how competitive that is though since the test factors in too.
My team has been getting ~1-2.5% error in about 45 seconds. Heard some team has managed to get similar accuracy in 30 seconds, which is pretty surprising
B or C?
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Re: Simple Machines B/Compound Machines C

Postby JonB » March 31st, 2015, 8:55 am

What kind of accuracies and times are people getting in the build portion? We've been taking about a minute for ~3% error. Hard to tell how competitive that is though since the test factors in too.
My team has been getting ~1-2.5% error in about 45 seconds. Heard some team has managed to get similar accuracy in 30 seconds, which is pretty surprising
B or C?
Also my thought. Additionally, keep in mind it is important to look at how often a team can get that speed and accuracy. They might be able to do it once, but can they do it over and over again at that speed/accuracy?

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Re: Simple Machines B/Compound Machines C

Postby slytherin » April 1st, 2015, 2:37 pm

Hey everyone, my state competition is this Saturday (the 4th) and I was wondering if anyone had any last minute tips or things to study or anything really. PLEASE! Any help would be appreciated. Thanks in advance :D
State:
Anatomy: 2nd
Meteorology: 2nd
Simple Machines: 2nd
Solar System: 2nd
Notice a pattern :lol:

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Re: Simple Machines B/Compound Machines C

Postby jkang » April 1st, 2015, 9:43 pm

What kind of accuracies and times are people getting in teh build portion? We've been taking about a minute for ~3% error. Hard to tell how competitive that is though since teh test factors in too.
My team has been getting ~1-2.5% error in about 45 seconds. Heard some team has managed to get similar accuracy in 30 seconds, which is pretty surprising
B or C?
Both us and the mentioned team are in Division C. And I personally found reaching 30 seconds even once to be surprising, as generally my team's current fastest time is around 40 seconds or so.
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Re: Simple Machines B/Compound Machines C

Postby Giant Mole Squad » April 11th, 2015, 8:18 am

Does anyone know how to solve number 4 on the Captain's Tryouts test for Compound Machines? :?:

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Re: Simple Machines B/Compound Machines C

Postby Unome » April 11th, 2015, 10:30 am

Does anyone know how to solve number 4 on the Captain's Tryouts test for Compound Machines? :?:
Yeah, I spent so much time trying to figure out that one (and I still don't know); I never understood tension beyond what I needed to solve Div B level problems.
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Re: Simple Machines B/Compound Machines C

Postby daydreamer0023 » April 15th, 2015, 6:12 pm

Does anyone know if you are required to simplify your mass ratios while doing device testing? And is it required that you know how to do tension for division B? Thanks to anyone who decides to help. :)
"I am among those who think that science has great beauty. A scientist in his laboratory is not only a technician: he is also a child placed before natural phenomena which impress him like a fairy tale." - Marie Curie

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Re: Simple Machines B/Compound Machines C

Postby Unome » April 15th, 2015, 6:31 pm

Does anyone know if you are required to simplify your mass ratios while doing device testing? And is it required that you know how to do tension for division B? Thanks to anyone who decides to help. :)
Ratio simplification/format is up to the supervisors individually (from the FAQs); most tests won't have anything that requires tension knowledge to solve, but it's possible.
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Re: Simple Machines B/Compound Machines C

Postby RontgensWallaby » April 17th, 2015, 3:37 pm

Just a question I came across earlier that I'm not quite sure about. It went something like this...
"A box is placed on top of an inclined plane. The slope of the inclined plane is gradually raised until the box begins to fall down the inclined plane. If the friction coefficient is 0.4121 (I think this was it), what is the angle made between the inclined plane and the ground when the box begins to fall?"
I'm not sure if this is solvable, but I did it one way and my answer was 36°. I would really appreciate if anyone could solve and explain it to me or tell me if it is unsolvable.
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it. - Niels Bohr

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Re: Simple Machines B/Compound Machines C

Postby sciolyboy123 » April 17th, 2015, 3:42 pm

What is the average time for you guys going to nationals (Div.B)?
2014-15 Season
(Hooch,Dodgen, Regionals, State, Nats)
Bio-Process Lab(3rd,5th,-,3rd,14th ;) )
Disease Detectives (1st,5th,1st,1st,10th 8-) )
Crave The Wave (2nd,-,-,-,-)
Experimental Design (-,1st, 4th,-,-)
Picture This (4th,6th, 1st, 4th,48th :oops: )
Simple Machines (1st,n/a, 1st, n/a)


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