Simple Machines B/Compound Machines C

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Re: Simple Machines B/Compound Machines C

Post by Flavorflav » September 20th, 2013, 5:24 am

A question for those who may know more about this topic than I do: if questions are limited to static equilibrium per 4.a.iii, how could they involve kinetic energy as suggested in 4.a.ii?

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Re: Simple Machines B/Compound Machines C

Post by CEOArchAngel » October 13th, 2013, 3:06 pm

Does anyone know the formulas needed for Compound Machine this year?

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Re: Simple Machines B/Compound Machines C

Post by tle990 » October 17th, 2013, 3:46 pm

I can't seem to find any practice tests for Simple Machines. Am I looking in the wrong place? Thanks!

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Re: Simple Machines B/Compound Machines C

Post by chalker » October 17th, 2013, 4:04 pm

tle990 wrote:I can't seem to find any practice tests for Simple Machines. Am I looking in the wrong place? Thanks!
It's a brand new event this year, thus there isn't likely to be any practice tests yet. Why don't you take a stab at making one yourself and sharing with everyone via the test exchange?

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Re: Simple Machines B/Compound Machines C

Post by ahoback » October 17th, 2013, 6:29 pm

PLTW has some great rudimentary resources concerning simple machines, there are several links below...

http://www.mnps.org/AssetFactory.aspx?did=63816

http://www.wilsonsd.org/cms/lib01/PA010 ... oblems.pdf

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Re: Simple Machines B/Compound Machines C

Post by Scioly4Fun » November 1st, 2013, 9:15 am

In the Compound Machines Event, can the fulcrum points of the two levers and the connection point between the two levers be changed while measuring of the unknown mass?

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Re: Simple Machines B/Compound Machines C

Post by The Architect » November 2nd, 2013, 5:28 am

Scioly4Fun wrote:In the Compound Machines Event, can the fulcrum points of the two levers and the connection point between the two levers be changed while measuring of the unknown mass?
I believe that section 4.b.v.of the rules says you are allowed.


The rules say that all reference materials must be in a 3-ring binder. Does this mean just one 3-ring binder, or just that all notes must be in some 3-ring binder? e.g. a team has a binder for part 1 and another for part 2.
The reason I ask is that I've seen the use of explicitly 1 binder for other events, while this seems more ambiguous.
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Re: Simple Machines B/Compound Machines C

Post by mnstrviola » November 2nd, 2013, 10:14 pm

The Architect wrote: The rules say that all reference materials must be in a 3-ring binder. Does this mean just one 3-ring binder, or just that all notes must be in some 3-ring binder? e.g. a team has a binder for part 1 and another for part 2.
The reason I ask is that I've seen the use of explicitly 1 binder for other events, while this seems more ambiguous.
I've submitted a FAQ for this onto soinc.org, and will post the response when it comes :)

EDIT: The reply says that only one 3-ring binder may be used.

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Re: Simple Machines B/Compound Machines C

Post by lepidolite » November 5th, 2013, 11:28 am

What to Build?

I am having a horrible time trying to picture and imagine what is supposed to be built for the Compound Machines event. Does anyone have an idea of where I could look for ideas? :oops:

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Re: Simple Machines B/Compound Machines C

Post by chalker » November 5th, 2013, 5:12 pm

lepidolite wrote:What to Build?

I am having a horrible time trying to picture and imagine what is supposed to be built for the Compound Machines event. Does anyone have an idea of where I could look for ideas? :oops:
For compound machines, the device is a class 1 lever with the 'load' attached to the 'effort' of a class 2 lever. Wikipedia has a good overview of the various types of levers: http://en.wikipedia.org/wiki/Lever

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