47 Replies
@Gyro Gearloose
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is it b?
Nope
But I think you figured that out as well and it's not the answer?
Sadly this is also not the case
I agree with the force wala part
But acc to ans
Reaction force wont even change
Ig there is something we are missing out in the reaction force
All the equations are at instant
@Real potato
Proportional isliye as elasticity vagerah property ke liye
But ye ans nahi hai
I think force wala part should be correct
Is hemisphere fixed or can move?
@Real potato
Fixed
nhi
Force decrease hoga apka increase ara
mere sir ne ye mathematical proof ke sath solve kiya tha but I forgot
he used the thing where forces on a single point and use sine rule on them
I remember he used the height of the pulley from centre and the radius as constants and got the force and normal reaction in terms of them and a trigonometric term related to the angle taken from ball to centre
Lami' s theorem
I get your point, i know that this is the exact solution of this que mentioned in the book
But where am i making mistake
@SirLancelotDuLac can you take a look at this:uhh:
thinking of the force being acted along the tangent
it won't happen always
uhh can you elaborate?
only at a single point where line from pulley is tangent
you took the force and mgsin along the same line
but will it always happen?
Is this a qualitative question? As the surface becomes more horizontal, the component of mg alonf the string decreases and hence F must decrease as well, while that perpendicular to surface increases, so R increases as well.
remember that the pulley is fixed and so is the hemisphere
Giving the answer as B ig.
the line joining pulley and ball won't always be tangential to the hemisphere
Ans is c
and mg sin is always tangential to surface
i get ur point
Oh right.
Its more like string tries to go vertically.
Dem this is hard.
Indeed
Can there be any alternative solution to this?
Except for that lami theorem and sine rule thing
I was thinking of asking sir but can't really find him free nowadays
I feel like other solutions would require a ton of geometry though :/
lami one already requires tons of equations
making angles
Not really
The ans to this que thru lami is just like 2-3 lines
bhai dhundne me to rona agya
xD
we got to lami just because the ball moved " gradually " so we assumed net forces to be ≈ 0
yeah but lami wali cheez jesa solutions kbhi click ni krta so im trying to find thru general approach
Yeah
Idk man, I forgor phycix atp. :sweaty:
imma try too
🔥 yeah
:aah:
bhai hua kya
abhi to ni if ill get something ill ping u
pulling force ki baat karra saar
Acha acha vesa
But normal force constant wla kese ayega fir @Priyam Alok
Lemme try and reply in morning
@Priyam Alok kuch aya kya bro
@Sephrina ye wla close kr dena please i got it solved by my teacher
bot is down rn
i will do once it starts
Okay