Low IMA Pulley Task
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Re: Low IMA Pulley Task
Wow thanks for the illustration! Could you explain how you apply the effort in the example of the pulley system with the IMA of 0.50? Would the effort be pulled up?Unome wrote:Agreed, this would be much easier. An illustration, for those not familiar with pulleys:Tesel wrote:The easier thing would be a simple block and tackle type pulley (I think that's what it's called). One fixed pulley and one movable pulley give you an IMA of 0.5 so long as you pull down on the movable pulley.
low IMA pulley.png
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Re: Low IMA Pulley Task
No, it's pulled downward as usual (because it's better to let gravity do the work for you).VictoryChicken wrote:Wow thanks for the illustration! Could you explain how you apply the effort in the example of the pulley system with the IMA of 0.50? Would the effort be pulled up?Unome wrote:Agreed, this would be much easier. An illustration, for those not familiar with pulleys:Tesel wrote:The easier thing would be a simple block and tackle type pulley (I think that's what it's called). One fixed pulley and one movable pulley give you an IMA of 0.5 so long as you pull down on the movable pulley.
low IMA pulley.png
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Re: Low IMA Pulley Task
Try your HS physics department.PM2017 wrote:Where are people getting their weights? They seem ridiculously expensive.
David Cutting
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Re: Low IMA Pulley Task
Thanks for the advice, but unfortunately, that solution isn't available to us.davecutting wrote:Try your HS physics department.PM2017 wrote:Where are people getting their weights? They seem ridiculously expensive.
One of the physics teachers at our school hates SciOly, so she won't help us. The other one doesn't have any to lend us, especially not for the whole year.
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Re: Low IMA Pulley Task
Try this: https://www.amazon.com/Ajax-Scientific- ... eel+weightPM2017 wrote:Thanks for the advice, but unfortunately, that solution isn't available to us.davecutting wrote:Try your HS physics department.PM2017 wrote:Where are people getting their weights? They seem ridiculously expensive.
One of the physics teachers at our school hates SciOly, so she won't help us. The other one doesn't have any to lend us, especially not for the whole year.
Or this: https://www.amazon.com/American-Weigh-S ... eel+weight
I'd probably go with the second one since I can 3D print an adapter, but the first one has a nice hook on it for your string. I'd also suggest setting up some sort of linear rod with a recirculating linear ball bearing so that the weight stays where it should.
David Cutting
Ward Melville HS Science Olympiad
Ward Melville HS Science Olympiad
Hovercraft: Islip Invy 2[sup]nd[/sup], MIT Invy 26[sup]th[/sup], Regionals 3[sup]rd[/sup], SOUP 3[sup]rd[/sup], Statees 3[sup]rd[/sup] Mission Possible: Islip Invy 11[sup]th[/sup], MIT Invy 11[sup]th[/sup], Regionals 1[sup]st[/sup], SOUP 2[sup]nd[/sup], States 2[sup]nd[/sup] Game (Alternate): MIT Invy 32[sup]nd[/sup]
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Re: Low IMA Pulley Task
Unome wrote:No, it's pulled downward as usual (because it's better to let gravity do the work for you).VictoryChicken wrote:Wow thanks for the illustration! Could you explain how you apply the effort in the example of the pulley system with the IMA of 0.50? Would the effort be pulled up?Unome wrote: Agreed, this would be much easier. An illustration, for those not familiar with pulleys:
low IMA pulley.png
Got it. Thanks!
Re: Low IMA Pulley Task
Hey! Sorry, but I’m still struggling to understand the 0.5 IMA pulley. How does the effort pull down if the Circle represents the disk of the pulley? Also how would you connect that to the 7:1 pulley?Unome wrote:Agreed, this would be much easier. An illustration, for those not familiar with pulleys:Tesel wrote:The easier thing would be a simple block and tackle type pulley (I think that's what it's called). One fixed pulley and one movable pulley give you an IMA of 0.5 so long as you pull down on the movable pulley.
low IMA pulley.png
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Re: Low IMA Pulley Task
The effort pulls down if you make it more than twice as heavy as the load. Otherwise, it doesn't pull anything - hence the 0.5 IMA.Ash123 wrote:Hey! Sorry, but I’m still struggling to understand the 0.5 IMA pulley. How does the effort pull down if the Circle represents the disk of the pulley? Also how would you connect that to the 7:1 pulley?Unome wrote:Agreed, this would be much easier. An illustration, for those not familiar with pulleys:Tesel wrote:The easier thing would be a simple block and tackle type pulley (I think that's what it's called). One fixed pulley and one movable pulley give you an IMA of 0.5 so long as you pull down on the movable pulley.
low IMA pulley.png
Re: Low IMA Pulley Task
But how does the effort cause the pulley to move if it is connected to the disk of one of the pulleys? If I understand the diagnosis correctly, a string weaves through two disk and holds a load on one end while being fixed on the other. So how could the effort pull anything if it is connected to the disk?Unome wrote:The effort pulls down if you make it more than twice as heavy as the load. Otherwise, it doesn't pull anything - hence the 0.5 IMA.Ash123 wrote:Hey! Sorry, but I’m still struggling to understand the 0.5 IMA pulley. How does the effort pull down if the Circle represents the disk of the pulley? Also how would you connect that to the 7:1 pulley?Unome wrote: Agreed, this would be much easier. An illustration, for those not familiar with pulleys:
low IMA pulley.png
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