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That would be nice to know. Captains didn't share the rules so...haha.

Oh, I see. Conceptually, I thought it would of been something along the lines where the output of the first machine was the input for the second. Thus, I thought it would have been something like F of resistance over F of effort of machine 1 times F of resistance over F of effort of machine 2.

So the input of machine 1 can be considered the input of the entire machine, whereas the output of 2 can be considered the output of the entire machine?

If they are linked like a compound machine, I believe that is the case.

Not sure if this has been asked before.

You can use 2 levers and a known mass to determine an unknown mass. My question is, why do you need to use the class 2 lever It seems like you could just use the class 1 lever as a scale.
If you need to use the other lever how would you
Thanks

You could just use a class 1 lever but the event requires that you use a class 1 lever connected to a class 2 lever. We linked the end of a class 1 lever to the end of a class 2 lever and hung the known mass from the end of the class 1 lever that is opposite the end that connects to the class 2 lever. Then we hung the unknown mass on the class 2 lever and moved it around on the lever until the whole thing was balanced and used our equation to find the weight of the unknown mass.

hexagonaria wrote:Not sure if this has been asked before.

You can use 2 levers and a known mass to determine an unknown mass. My question is, why do you need to use the class 2 lever It seems like you could just use the class 1 lever as a scale.
If you need to use the other lever how would you
Thanks

In the Div B event they only have to use a class 1 lever. We wanted the event to be a bit more challenging for Div C, thus are requiring the use of a class 2 lever instead.

Just curious, what scores are C-teams getting with their devices?

So I have a question

I don't know where to study for simple machines because the tests at the invites have been SO much harder than what there is to study. My question is where can I study for this event that is just as challenging as the real tests? I haven't found anything like the invite tests online and the resources for studying are just repeating simple things like AMA ima efficiency etc. Everything is more simple than the actual test. That wasn't a pun.

Help much appreciated.

Thanks

Sciolapedia wrote:So I have a question

I don't know where to study for simple machines because the tests at the invites have been SO much harder than what there is to study. My question is where can I study for this event that is just as challenging as the real tests? I haven't found anything like the invite tests online and the resources for studying are just repeating simple things like AMA ima efficiency etc. Everything is more simple than the actual test. That wasn't a pun.

Help much appreciated.

Thanks

Since simple machines is a topic commonly approached in upper elementary or middle school science, I am sure that you'll find lots of practice tests online including challenging problems. And read over the rules and see if there is anything you've not studied adequately.

And since you now have experience with real tests, learn the problems that you missed, of course!

Does anyone know anywhere I can find some difficult tests or problems? Everything I see is super repetitive - there's only so many times you can calculate an AMA before you get annoyed.

EDIT: Div B.

Question for the building part of Compound Machines (C)

Does the Unknown Mass have to be larger than the known mass? Or can it be a greater or lesser value? Just because In the rules when it states the ratio must be 1:12, or 1:16, or 1:20, I assumed that means the smaller mass must always be known because I thought they explained it that it was known to unknown mass? But I could be wrong.

Can I get some clarification on this?

Thanks