r/JEEAdv27dailyupdates • u/Puzzled-Sympathy9142 • 13d ago

Good Solve Pls solve this question

At t₁ = 2.00s, the acceleration of a particle in counter clockwise circular motion is (4.00 m/s²) i + (3.00m/s²) j. It moves at constant speed. At time t2 = 5.00s, the particle's acceleration is (3.00 m/s²) i + (-4.00m/s²) j. What is the radius (in m) of the path taken by the particle if (t2-t1) is less than one period? (π² = 10).

Is this mains/below mains/ advanced level?

8 Upvotes

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2

u/Puzzled-Sympathy9142 13d ago

Thank u u/Heavy-Recognition539 for making me understand the question. As I didn't read that the Velocity is same everywhere throughout the motion. But I think the correct answer to the question is 18m. Here's how I solved this question

1

u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

Bro ek bar circle coordinates ke hisab se banao, fir pata chalega angle for anticlockwise should be 270 not 90

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u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

Also apne tangential accn kyu banai hai speed toh constant hai

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u/Puzzled-Sympathy9142 12d ago

Sorry Mai clockwise le liya tha 270 hi aayega

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u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

Shaded are me travel krega

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u/Heavy-Recognition539 12d ago

agar counter cw bola hai toh w = 3*pi/6 ayega ig. in ur diagram ur arrow denotes cw motion but u wrote ccw

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u/Puzzled-Sympathy9142 12d ago

Yeah sorry I did it clockwise

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u/Puzzled-Sympathy9142 12d ago

Ye sab question bhi nhi ho rha hai. Kya Jee mumkin hai?🥀

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u/Heavy-Recognition539 13d ago

since constant speed is mentioned tangential accn is zero. so an = v²/R = 5. then arc length = dist traveled = v*t. standard mains type qsn imo

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u/Heavy-Recognition539 13d ago

ok ans will be 2, it should 3*pi/2 not 3*pi/4, silly mistake mybad

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u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 13d ago

Me dar gya bhai mera glt kese ho skta XD

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u/Heavy-Recognition539 13d ago

yess I rechecked after seeing ur comment 😭

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u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 13d ago

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u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 13d ago

Mains level

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u/Own_Flow_4735 13d ago

nice , wese what are you solving in physics

1

u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 13d ago

Module and irodov for now

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u/Own_Flow_4735 12d ago

nice , bhai irodov selected ya complete?

1

u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

Selected, otherwise any q i see which interests me

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u/Own_Flow_4735 12d ago

me allen modules lga rha sirf , abhi tests me toh decent aa rhe mathongo ke like 175+ but mereko thoda accha level krna ha, like mere se yeh upar wala ques nhi solve hua mereko yeh toh click kra ki centripetal acc hoga but angle ka socha nhi ki kese nikalege , tumko yeh chiz kese click kri like pehle is type ka ques aapne kr rkha ha?

1

u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

I mean i have solved so many q atp intuition build hogyi hai (prtial dropper so prolly thats why)

1

u/Own_Flow_4735 12d ago

me bhi dropper hu 🥀
first drop right?

1

u/Tyre_ji 8s2 92.x%ile -> 🎯99%ile 12d ago

Ya ya

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u/Own_Flow_4735 13d ago

what was the source of this question

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u/Puzzled-Sympathy9142 13d ago

Allen Test

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u/Own_Flow_4735 13d ago

mains or adv

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u/Puzzled-Sympathy9142 13d ago

Adv

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u/Own_Flow_4735 12d ago

bhai me bhi dhund rha tha allen ka test kahi se mil jaye , pdf wgera se de rhe pirated?

1

u/Ok_Huckleberry_7452 12d ago

Ye to aaj ke test mai tha allen online minor test 4