Simple Machines B/Compound Machines C

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Re: Simple Machines B/Compound Machines C

Post by Unome » October 10th, 2014, 4:16 pm

slytherin wrote:So, i made a normal lever with the fulcrum in the middle, and now me and my dad can't really figure out how to find the ratio of two weights, help?
a*A=b*b where a and b are masses and A and B are distances (unless I made a dumb mistake :P ).
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Re: Simple Machines B/Compound Machines C

Post by bearasmith » October 11th, 2014, 4:10 pm

Unome wrote:It could just be that we had really sucky tests, but the event always seemed very easy (Although I do like the extra difficulty with the lever now).
At nationals it seemed like the test had some difficult questions, however, it was mostly made up of easy questions. So, when it got down to time, we finished before the halfway mark. It would have been nice if the test was longer and harder. That's what it seemed to me at least. This is my favorite event. I'm glad that it came back for its second year. :D

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Re: Simple Machines B/Compound Machines C

Post by GoofyFoofer » October 12th, 2014, 9:46 am

Quick question. Isn't this a build event and not a lab event?
(this may have been asked before, I don't know)
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Re: Simple Machines B/Compound Machines C

Post by Unome » October 12th, 2014, 10:43 am

GoofyFoofer wrote:Quick question. Isn't this a build event and not a lab event?
(this may have been asked before, I don't know)
It's definitely a lab event. It has a test component & a lab component, also (somewhat subjective) the lab depends significantly on how well you can operate the build, rather than its technical power.
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Re: Simple Machines B/Compound Machines C

Post by retired1 » October 12th, 2014, 2:21 pm

Measured from the fulcrum, distance left times weight = distance right times that weight. Or d1wt 1 = d2 wt2 or wt1/wt2 = d2/d1 There is your ratio. They are labeled wt A, B, and C: the way you assign the weight letters, it is either the ratio above or the inverse of it. Say the distances are 50 for A and 30 for B. The ratio of A/B would be A/B = 30/50 or simplified = 3/5 If the ratio was B/A it would be 50/30 or 5/3

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Re: Simple Machines B/Compound Machines C

Post by Unome » October 12th, 2014, 3:38 pm

retired1 wrote:Measured from the fulcrum, distance left times weight = distance right times that weight. Or d1wt 1 = d2 wt2 or wt1/wt2 = d2/d1 There is your ratio. They are labeled wt A, B, and C: the way you assign the weight letters, it is either the ratio above or the inverse of it. Say the distances are 50 for A and 30 for B. The ratio of A/B would be A/B = 30/50 or simplified = 3/5 If the ratio was B/A it would be 50/30 or 5/3
Yeah, that's a better explanation than mine.
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Re: Simple Machines B/Compound Machines C

Post by DannyTheAwesome » October 14th, 2014, 2:49 pm

JonB wrote:
chinesesushi wrote:Anybody have any ideas for this year's build?

It can be done with minimal modifications from last year, but to accomplish this task QUICKLY is really the challenge.

Not really i believe that this year will be the same as last year, as i competed in nationals, it will come down to the written test to see who will win. ;)

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Re: Simple Machines B/Compound Machines C

Post by chinesesushi » October 14th, 2014, 6:18 pm

DannyTheAwesome wrote:
JonB wrote:
chinesesushi wrote:Anybody have any ideas for this year's build?

It can be done with minimal modifications from last year, but to accomplish this task QUICKLY is really the challenge.

Not really i believe that this year will be the same as last year, as i competed in nationals, it will come down to the written test to see who will win. ;)
Last year, the build determined who won. The top teams has scores very close/exactly the same as the next place. This year, the challenge of the build, like JonB says, is to shorten the amount of time to get results, so the build rather than the test will be the determining factor, like last year how the test was really same, but the build was different.
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Re: Simple Machines B/Compound Machines C

Post by DannyTheAwesome » October 29th, 2014, 4:30 pm

Did you compete in nationals last year?

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Re: Simple Machines B/Compound Machines C

Post by JonB » October 30th, 2014, 4:30 am

DannyTheAwesome wrote:Did you compete in nationals last year?
Yes.

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