NLM - Pulley shit

Idk how to go about the process of solving this sum đŸ˜”â€đŸ’«
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21 Replies
iTeachChem Helper
iTeachChem Helper‱9mo ago
@Gyro Gearloose
iTeachChem Helper
iTeachChem Helper‱9mo ago
Note for OP
+solved @user to close the thread when your doubt is solved. Mention the user who helped you solve the doubt. This will be added to their stats.
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
Any help about like the thinking process for these types of questions of string constraint would be lovely :))
iTeachChem
iTeachChem‱9mo ago
Khan Academy
Two masses hanging from a pulley (video) | Khan Academy
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
iTeachChem
iTeachChem‱9mo ago
(The hanging thing is one idea check the earlier videos of ‘treating systems’)
lmaodedXD
lmaodedXD‱9mo ago
wait, pullay massless nahi hai?
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
masless hai, string constraint se karna hai voh string constraint ka thinking process hi mujhe nahi aa rha
lmaodedXD
lmaodedXD‱9mo ago
from what i can observe, force of pullay on clamp zyada easy rahega calculate karna lemme try
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
It doesnt have the concept of string constraint sir, thank you tho 😁 force of clamp on the pulley is its normal force. I didnt get you with this one tho, fbd mein dkha sakte ho?
lmaodedXD
lmaodedXD‱9mo ago
answer is c?
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
nope B
lmaodedXD
lmaodedXD‱9mo ago
damn i see
iTeachChem
iTeachChem‱9mo ago
Oho okay. That’s strange.
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
So like in this system tension is the same throughout cuz there is only 1 string, but if lets say block m moves x distance, then block 2m will move x/2 distance Thus m moves with velocity v and 2m moves with v/2. That relation between velocity or distance moved is the concept of string constraint. Getting the idea that i need concept of string constraint and then establishing that relation is what im not able to understand. I mean like thru distance, we can relate velocity and accln so yeah its all part of the conept
Keshav
Keshav‱9mo ago
Let the distance between A and B is x and the distance between A and mass m is y so, $ 2x + y = l$ (constant) (taking accn in any direction we get $2\ddot{x} = \ddot{y}$ Now find the tension in the string and draw fbd of pulley A
TeXit
TeXit‱9mo ago
Keshav
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Keshav
Keshav‱9mo ago
I am getting T = 2mg/3 now draw fbd for the pulley and equate tension forces in the direction of the clamp to the support force
iTeachChem
iTeachChem‱9mo ago
Wah nice. This was the only part in whole of 11 12 that i blantantly just left. Most of mechanics. Time to revisit 🙂
KaiZĂȘn
KaiZĂȘnOP‱9mo ago
Yeahhh okay yeah cool Coool okay got it Appreciate the help guys!! +solved @Keshav @iTeachChem
iTeachChem Helper
iTeachChem Helper‱9mo ago
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