Simple Machines B/Compound Machines C

slytherin
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Re: Simple Machines B/Compound Machines C

Postby slytherin » March 14th, 2015, 9:20 am

OH!!! So what kinds of hooks would they be? Pictures would be awesome. Also, our lever doesn't seem to work, we use the right equation, but when we hang them directly (and then connect the two levers together with a string), our ratios are always off for some reason.

Any ideas? Thanks guys
Our team connected 2 zipties around the lever and then added a wire-like thing (that's not really like wire, but can bend and is strong, sorry for the REALLY bad explanation of what it is..) to the bottom of the ziptie so that it closed around the ziptie on one end and had a little U on the other end for you to hook the mass on.
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Re: Simple Machines B/Compound Machines C

Postby samlan16 » March 14th, 2015, 11:24 am

I found it after I posted. Thanks so much!! On another note, can we have our apparatus setup at the edge of the table so that the mass hanging down from the second class lever is hanging below the Lowest edge of the apparatus?
Though let me play the role of the mean event supervisor: Does your device work without the table? If not, did you impound the table? What if the supervisor is having you do this on the floor?

Just better to do what bernard suggested and elevate your fulcrum.
You could alternatively make your lever arm shorter if possible. That way, you are less likely to hit the table.
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Re: Simple Machines B/Compound Machines C

Postby joeyjoejoe » March 14th, 2015, 11:51 am

On another note, can we have our apparatus setup at the edge of the table so that the mass hanging down from the second class lever is hanging below the Lowest edge of the apparatus?
You could also prevent it from going down that far by putting some sort of stop on the lever. We implemented ours in the form of two nails 1" above and below the right side of our class 1 lever. That way, the lever couldn't go above or below balanced position by more than a few inches. This did create the need for a "quicker eye" when adjusting the lever but we came up with a solution for that as well - which I will share after all competitions are over. ;)

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Re: Simple Machines B/Compound Machines C

Postby davidkim2106 » March 14th, 2015, 8:14 pm

Anyone have any pictures of their device?
Sup.

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boomvroomshroom
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Re: Simple Machines B/Compound Machines C

Postby boomvroomshroom » March 14th, 2015, 8:17 pm

Anyone have any pictures of their device?
You could go in the image gallery.

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Re: Simple Machines B/Compound Machines C

Postby bernard » March 15th, 2015, 9:41 am

Anyone have any pictures of their device?
A link to a picture of the device I made for our team.
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Re: Simple Machines B/Compound Machines C

Postby davidkim2106 » March 15th, 2015, 10:39 am

Anyone have any pictures of their device?
You could go in the image gallery.
Keep in mind I said pictures of their devices :)
Anyone have any pictures of their device?
A link to a picture of the device I made for our team.
Thanks bernard :) Could you explain what the little things above the levers are? Also, where would you attach the masses? I don't see hooks

EDIT: nvm i see them, thanks :)
Sup.

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Re: Simple Machines B/Compound Machines C

Postby chinesesushi » March 15th, 2015, 10:52 am

Anyone have any pictures of their device?
A link to a picture of the device I made for our team.
Thanks bernard :) Could you explain what the little things above the levers are? Also, where would you attach the masses? I don't see hooks

EDIT: nvm i see them, thanks :)
I believe those are levels that he uses to see whether the system of levers is in equilibrium or not, for more accuracy.
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Re: Simple Machines B/Compound Machines C

Postby goodcheer » March 18th, 2015, 6:26 am

Anyone have any pictures of their device?
A link to a picture of the device I made for our team.

Bernard, I understand how the first class lever can rest in equilibrium, but how about the second class lever? Do you have a fixed counter-weight attached to it to the right of the fulcrum or do you adjust the first class lever to the point where it can balance the second class lever? Anyone else with idea please help. We just got someone new on this event. Thanks.

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Re: Simple Machines B/Compound Machines C

Postby bernard » March 18th, 2015, 7:45 am

Anyone have any pictures of their device?
A link to a picture of the device I made for our team.

Bernard, I understand how the first class lever can rest in equilibrium, but how about the second class lever? Do you have a fixed counter-weight attached to it to the right of the fulcrum or do you adjust the first class lever to the point where it can balance the second class lever? Anyone else with idea please help. We just got someone new on this event. Thanks.
Yes, a fixed counterweight would let the second class lever rest in equilibrium, which would hopefully allow for more accurate predictions.
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