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See rule 4.b.vii

Same as last year's High IMA Pulley task except with a lower IMA requirement.

Last year's IMA of over 7 could was to be achieved with a mainly with a motor because without an inclined plane, the weight coming down to raise the 500g object 10cm would need a 70 cm vertical displacement which is more than the 60cm height restriction of the whole device. So unless that 70cm displacement was done on an inclined plane going downwards or in two stages of items falling down, a motor was needed.

This year, you can't use a motor on this task because is non-electrical. Therefore you need the 30cm displacement of another item to raise the 500g block by 10cm. So the IMA is not the only difference; the non-electrical part plays a role.

trdd wrote:Last year's IMA of over 7 could was to be achieved with a mainly with a motor because without an inclined plane, the weight coming down to raise the 500g object 10cm would need a 70 cm vertical displacement which is more than the 60cm height restriction of the whole device. So unless that 70cm displacement was done on an inclined plane going downwards or in two stages of items falling down, a motor was needed.

This year, you can't use a motor on this task because is non-electrical. Therefore you need the 30cm displacement of another item to raise the 500g block by 10cm. So the IMA is not the only difference; the non-electrical part plays a role.

if anyone has already figured this out, are you just using the height of a taller mission, or what?

chessbucket wrote:

trdd wrote:Last year's IMA of over 7 could was to be achieved with a mainly with a motor because without an inclined plane, the weight coming down to raise the 500g object 10cm would need a 70 cm vertical displacement which is more than the 60cm height restriction of the whole device. So unless that 70cm displacement was done on an inclined plane going downwards or in two stages of items falling down, a motor was needed.

This year, you can't use a motor on this task because is non-electrical. Therefore you need the 30cm displacement of another item to raise the 500g block by 10cm. So the IMA is not the only difference; the non-electrical part plays a role.

if anyone has already figured this out, are you just using the height of a taller mission, or what?

Our dimensions are something like 35*25*30

Unome wrote:See rule 4.b.vii

Same as last year's High IMA Pulley task except with a lower IMA requirement.

Could one combine this with the magnet task - the falling magnet pulls the object up?

Jacobi wrote:

Unome wrote:See rule 4.b.vii

Same as last year's High IMA Pulley task except with a lower IMA requirement.

Could one combine this with the magnet task - the falling magnet pulls the object up?

That would violate rule 3.d. since the magnet is used for the magnet task and the pulley task.

aaron@lhs wrote:

Jacobi wrote:

Unome wrote:See rule 4.b.vii

Same as last year's High IMA Pulley task except with a lower IMA requirement.

Could one combine this with the magnet task - the falling magnet pulls the object up?

That would violate rule 3.d. since the magnet is used for the magnet task and the pulley task.

Wouldn't the falling mass be the thing released by the magnet, not the magnet itself? The task requires that the object released by the magnet should initiate the next action, and the released object would not actually be "used" in task xii, as far as I can tell, so couldn't you use it as the counterweight for this task? Or am I misinterpreting?

Hello! For the pulley task, we have a 3 ima pulley, which theoretically should be good. However, in real life, it doesn't lift the load with a mass 1/3 of the load, no matter how much we change it around. I know IMA and AMA are different things. Could this count as a 3 ima pulley because it still technically follows the "physics" or does it have to use a load mass smaller than the actual?

mpnobivucyxtz wrote:Hello! For the pulley task, we have a 3 ima pulley, which theoretically should be good. However, in real life, it doesn't lift the load with a mass 1/3 of the load, no matter how much we change it around. I know IMA and AMA are different things. Could this count as a 3 ima pulley because it still technically follows the "physics" or does it have to use a load mass smaller than the actual?

You have answered your own question. The rules specify IMA, not AMA.

Would it be legal to have a 3 ima pulley be pulled by a load on a 1/2 ima pulley, since there is one distinct section with an ima of 3?