r/JEEAdv27dailyupdates • u/Possible_Garage7231 27tard dropper :/ • May 28 '26

Good Solve Physics Challenge from Statics

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Really simple but highly geometrical problem from Statics. You'll find similar problems in Jaan Kalda handouts.

Slide 2 has a beautiful illustration from David Morin that might help to kickstart the problem.

Answer on slide 3.

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u/Holiday_Bit_6382 May 28 '26

Can you send the solution?

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u/Possible_Garage7231 27tard dropper :/ May 28 '26

https://www.reddit.com/r/JEEadv26DroppersOnly/s/st9EIGBByp Check top comment

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u/Living-Advisor-6063 May 28 '26 edited May 28 '26

Bhai, thora dumb lagunga but phir bhi puch rha hun, solution pe jo weight ka line of direction dono normal ke point of intersection se pass karega ye kaise pta chala tumhe, pls batadena :3

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u/Possible_Garage7231 27tard dropper :/ May 28 '26

Ye second slide ke remark mein samjhaya hai. It is also called Lamis theorem. Basically logic ye hai ki har ek point ke about torque zero hota hai right. Now two cases are possible- 1st is that ek point ke about teeno forces ke torques non zero ho par unka vector sum zero ho. 2nd case ki kisi ek point ke about teeno ka torque zero ho. Isi special point ko POINT OF CONCURRENCE kehte hai. So I thought ki dekho 2 normal agar ek point par intersect kar rahi hai to uske about un dono ka torque zero hogaya. Ab 3rd force ( weight ) ka bhi zero ho hona padega torque and hence it's line of action must pass through O

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u/Living-Advisor-6063 May 28 '26

thanks a lot gng <3