High IMA Pulley Task

User avatar
Ashernoel
Member
Member
Posts: 345
Joined: January 27th, 2017, 1:31 pm
Division: Grad
State: IL
Has thanked: 0
Been thanked: 2 times

Re: High IMA Pulley Task

Post by Ashernoel »

https://docs.google.com/drawings/d/1SAP ... sp=sharing

Is this an IMA of 3 or an IMA of 1 or of _______?
NT '19
Harvard '23
User avatar
Unome
Moderator
Moderator
Posts: 4336
Joined: January 26th, 2014, 12:48 pm
Division: Grad
State: GA
Has thanked: 235 times
Been thanked: 85 times

Re: High IMA Pulley Task

Post by Unome »

Ashernoel wrote:https://docs.google.com/drawings/d/1SAP ... sp=sharing

Is this an IMA of 3 or an IMA of 1 or of _______?
It's an IMA of 1. If the load was also attached to the movable pulley, it would be an IMA of 3 (assuming I remember how to do this correctly).
Userpage

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.
User avatar
Ashernoel
Member
Member
Posts: 345
Joined: January 27th, 2017, 1:31 pm
Division: Grad
State: IL
Has thanked: 0
Been thanked: 2 times

Re: High IMA Pulley Task

Post by Ashernoel »

Unome wrote:
Ashernoel wrote:https://docs.google.com/drawings/d/1SAP ... sp=sharing

Is this an IMA of 3 or an IMA of 1 or of _______?
It's an IMA of 1. If the load was also attached to the movable pulley, it would be an IMA of 3 (assuming I remember how to do this correctly).
Alright that makes sense thx
NT '19
Harvard '23
User avatar
Ashernoel
Member
Member
Posts: 345
Joined: January 27th, 2017, 1:31 pm
Division: Grad
State: IL
Has thanked: 0
Been thanked: 2 times

Re: High IMA Pulley Task

Post by Ashernoel »

If an object were attached to a moveable section of a pulley system by a fixed length string, it would be physically the same as attaching the object directly to the moveable section of the pulley system, right?

A load that attaches to a tackle by a hook or other means fixed length means is an essential piece of block and tackle pulleys. Block and tackle pulleys are pretty key in getting an IMA of 7 (from what I've seen and read today), so to say the object can not be attached to the moveable section of the pulley, the tackle, would make this task much much harder. It would also make achieving a .5 IMA almost impossible (if not impossible?).

Does this logic make sense?
Sidenote: I have not officially picked this event up, but I find it interesting and from the post above you can tell I'm toying with ideas. IDK exactly what I'm talking about
NT '19
Harvard '23
User avatar
PM2017
Member
Member
Posts: 524
Joined: January 20th, 2017, 5:02 pm
Division: Grad
State: CA
Has thanked: 23 times
Been thanked: 13 times

Re: High IMA Pulley Task

Post by PM2017 »

Is it ok to use lead beads like these (https://www.rotometals.com/pure-lead-nu ... gIHt_D_BwE) for weights, as long as they are entirely enclosed?
West High '19
UC Berkeley '23

Go Bears!
User avatar
Unome
Moderator
Moderator
Posts: 4336
Joined: January 26th, 2014, 12:48 pm
Division: Grad
State: GA
Has thanked: 235 times
Been thanked: 85 times

Re: High IMA Pulley Task

Post by Unome »

PM2017 wrote:Is it ok to use lead beads like these (https://www.rotometals.com/pure-lead-nu ... gIHt_D_BwE) for weights, as long as they are entirely enclosed?
I would recommend against it. I've known teams to be penalized for lead that was completely enclosed in the past.
Userpage

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.
ftf841
Member
Member
Posts: 31
Joined: March 28th, 2017, 3:21 pm
Division: C
State: MD
Has thanked: 0
Been thanked: 0

Re: High IMA Pulley Task

Post by ftf841 »

PM2017 wrote:Is it ok to use lead beads like these (https://www.rotometals.com/pure-lead-nu ... gIHt_D_BwE) for weights, as long as they are entirely enclosed?
We used rolls of pennies
i'll work on my events eventually

Centennial High School
Exclusive Game On Competitor
davecutting
Member
Member
Posts: 34
Joined: October 29th, 2014, 4:12 pm
Division: C
State: NY
Has thanked: 0
Been thanked: 0
Contact:

Re: High IMA Pulley Task

Post by davecutting »

ftf841 wrote:
PM2017 wrote:Is it ok to use lead beads like these (https://www.rotometals.com/pure-lead-nu ... gIHt_D_BwE) for weights, as long as they are entirely enclosed?
We used rolls of pennies
You could also borrow a 500g mass from your physics department
David Cutting
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]
oofboy69
Member
Member
Posts: 4
Joined: January 21st, 2018, 7:20 pm
Has thanked: 0
Been thanked: 0

Re: High IMA Pulley Task

Post by oofboy69 »

Okay so I just realized that since the IMA is 7, it would require a weight to fall 70cm to lift something 10cm. The maximum height of the device is 60cm, so how am I going to pull the pulley up 10cm?
ScottMaurer19
Member
Member
Posts: 592
Joined: January 5th, 2017, 9:39 am
Division: Grad
State: OH
Has thanked: 0
Been thanked: 1 time

Re: High IMA Pulley Task

Post by ScottMaurer19 »

oofboy69 wrote:Okay so I just realized that since the IMA is 7, it would require a weight to fall 70cm to lift something 10cm. The maximum height of the device is 60cm, so how am I going to pull the pulley up 10cm?
Use a motor or have a 7:1 gear system so that a weight only needs to fall 10 cm to lift up the other 10 cm. You could make the heavier weight only slightly heavier and use this as a mechanical timer.
Solon '19 Captain, CWRU '23
2017 (r/s/n):
Hydro: 3/5/18
Robot Arm: na/1/1
Rocks: 1/1/1

2018 (r/s/n):
Heli: 2/1/7 
Herp: 1/4/4
Mission: 1/1/6
Rocks: 1/1/1
Eco: 6/3/9

2019 (r/s/n):
Fossils: 1/1/1
GLM: 1/1/1
Herp: 1/1/5
Mission: 1/1/3
WS: 4/1/10

Top 3 Medals: 144
Golds: 80
Locked

Return to “Mission Possible C”

Who is online

Users browsing this forum: No registered users and 2 guests