Mission Possible B

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knittingfrenzy18
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Re: scorable tasks

Post by knittingfrenzy18 » November 11th, 2012, 3:51 pm

Well you get scored on:
Starting task
Ending task
(special task if you wish to include it)
plus 8 more.

So in max you can get 11 tasks scored, but without the special, you can get 10.
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Re: Mission Possible B

Post by gesturallyimprobable » November 12th, 2012, 5:19 am

I think it would be rather simple to make gears with wood and hot glue. I built my paddlewheel in this way last year, and it worked rather well.

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Re: Mission Possible B

Post by XXiggy_gimXX » November 14th, 2012, 2:38 pm

I am wondering, how do you find the IMA of a lever system. I scoured GOOGLE, but nothing camje up with a definate answer. I know how to find it in general, but I have no clue on how it applies to lever systems.

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Re: Mission Possible B

Post by chalker » November 14th, 2012, 5:54 pm

XXiggy_gimXX wrote:I am wondering, how do you find the IMA of a lever system. I scoured GOOGLE, but nothing camje up with a definate answer. I know how to find it in general, but I have no clue on how it applies to lever systems.

Wikipedia can help you: http://en.wikipedia.org/wiki/Compound_lever

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Re: Mission Possible B

Post by olympiaddict » November 14th, 2012, 6:33 pm

Think of if like a composition of functions- If one lever's mechanical advantage is given by f(x) = 6x, and the other lever in the system (whose input arm is acted upon by the last lever's output arm) has mechanical advantage given by g(x) = 2x, the total is f(g(x)) or 12x. X being the input force on the first lever.

Caveat- the "input arm" and "output arm" are not necessarily on different arms, they'll be on the same arm / side of the fulcrum if they're part of a 2nd or 3rd class lever. They'd just be different "input areas" on the levers.

Correct me if I'm wrong anyone (chalker).

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Re: Mission Possible B

Post by goodcheer » November 15th, 2012, 6:15 am

For making your own wooden gears check out the following link. It has a template generator where you can print out any size gear you want on paper which can be transferred to wood. Also shows how to do it.

http://woodgears.ca/gear/howto.html

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Re: Mission Possible B

Post by benk » December 4th, 2012, 5:07 pm

what constitutes a homemade? because I just molded a K'Nex gear with clay and then pour melted plastic into the mold, would that count as "homemade", cause I made it?
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Re: Mission Possible B

Post by A Person » December 5th, 2012, 3:34 pm

benk wrote:what constitutes a homemade? because I just molded a K'Nex gear with clay and then pour melted plastic into the mold, would that count as "homemade", cause I made it?
I would think so.
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Re: Mission Possible B

Post by melissay63 » December 11th, 2012, 2:42 pm

does anyone have any idea for the "moving air" task...? I'm so lost for that task...
So far...medaling has been a rollercoaster
but hopefully, next one would be on top!

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Re: Mission Possible B

Post by hogger » December 12th, 2012, 6:36 am

First thought that comes to mind for the air task would be a balloon filled with air that can be released to do some sort of work.

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