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yes, ...........means at least do it once it may be asked

das gupta is must must must.......................aftr completing that if u have tym..............surely go for tmh:)...........its really nice

case 1-
when incline is in motion
den along d incline eqn is
macos30=mgsiin 30
also
F1=masin30+mgcos 30=mgsin 30 tan 30+mg cos 30
also
F2=mgcos 30.....
F1/F2=(mgsin 30 tan 30+mg cos 30)/mg cos 30
=(1/2rt3+rt3/2)rt3/2=4/3
cheers!

after 2 secs ..............horizontally-
v1=ucos theta=49rt3/2
v2=u sin theta-gt
=49/2-9.8x2
=4.9
v=rt(4.9^2+49^2(3/4))
v=49rt(7/20)

2) time taken =rt(2h/g)

since h is same ............den ratio 1:1........

since speed =c.....

so simple relations wont work

by lorentz transformations

u^'_x=(u_x-v)/(1-v.u_x/c^2)

=(c-(-c)/1+1=c......i.e speed of lyt.............i don think its in jee syll

cooooooooooooool........buttt....padhe the.........:|

arey look..............xactly same has happed wid me.......but ur tym is less yaar......means my cllg is 8-5 still i can give 3-4 hrs to jee......n weekends r toh ekdum free yaar.............okkk i understaand cllg lyf is diff......seniors room calls par bulate hain dey eat a lot of ur tym those mess ki lambi lyn n all....(if u in a hostel).. but still d nyt is free yaar...........n yeah u can drop aa sem(sem 2) dose 3 months can turn ur lyf......means if u were fully prepared last year den u just need to rivise now n give a fuul shot nxt year............wid 3 mnths die heart pratice .............go for it wid a full spirit

draw d fig u'll get angle BFO=angle BGO=45 deg
thus FBO too becomes n isoceles ryt angled triangle
thus
FO=BO
ae=b
squaring
(ae)^2=a^2(1-e^2)
2e^2=1
e=1/rt2

its a straight application of d fact dat says
(n1a+n2b+n3c)/n1+n2+n3>=(n1+n2+n3)th root of(n1an2bn3c)

d giiven xpression is
=9(a^3+27+b^3)/ab
=9{(a+b)(a^2+b^2-ab)+27}/ab
=9(a+b)(a/b+b/a-1)+27/ab}
this attians minima at a=b1
thus req value=29

mine is cse but first year course is same.....varies frm coll to coll
engg maths, engg phy, chem, engg drawing, solid mech, worksop practice, socialscience blah blah.....depends on ur coll.....means dese subjects r for 1st 2 sems....half in one rest in other..........

mathematics for iit jee-tata mcgrew hill

6 hrs is a g really gud tym if u really focussed................
mark my words.....u shud be damn focussed..........

for problems on locus firstly,

take d required point to be P(h.k)

den, for required euations.........wid d conditions given.....at least 2 cond shud be dere........

now eliminate variables fron dese equations formed............

finally u get an equation....purely in d form of h and k....

now in dis equation replace h byx and y by k........den u get d required equation of d locus...........