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  1. Y

    Physics MCQs thread.

    f=mg so 2g-6=10a because both mass will move sa a=1.4 option a
  2. Y

    Physics MCQs thread.

    change =0.5*m*(25^2-(-5)^2
  3. Y

    Physics MCQs thread.

    becoz d*v is mass not weight
  4. Y

    Physics MCQs thread.

    http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf q. no 5 and 22 plz hassan ,zishi or any one who know??? plz plz plz
  5. Y

    Physics MCQs thread.

    0.5mu^2=ke so u=30 now f=-ma a=-6 now use v^2=u^2+2as v=0 so s=75 ans iz b?? is this answer??
  6. Y

    Physics MCQs thread.

    f u take moment from cg f*h/2+f*h/2=wa which is also same as option a have u get tis???? its sufficient////
  7. Y

    Physics MCQs thread.

    cg iz centre of gravityi.e middle w perp. dist from upper f 2 lower f iz 2a
  8. Y

    Physics MCQs thread.

    this cie compose wat a tricky question
  9. Y

    Physics MCQs thread.

    moment=f*perp. dist between line of action and pivot or from where u have taken moment so here take moment about any point let from upper f w*a+f*h=w*2a its option a if u take moment from cg f*h/2+f*h/2=wa which is also same as option a
  10. Y

    Physics MCQs thread.

    which q.???
  11. Y

    Physics MCQs thread.

    post ur q. by screen catch or send link
  12. Y

    Physics MCQs thread.

    use eng languaege ok u hassan
  13. Y

    Physics MCQs thread.

    its ans is c its alright
  14. Y

    Physics MCQs thread.

    A source of e.m.f. of 9.0 mV has an internal resistance of 6.0 Ω. It is connected across a galvanometer of resistance 30 Ω. What will be the current in the galvanometer? A 250 μA B 300 μA C 1.5 mA D 2.5 mA any one????
  15. Y

    Physics MCQs thread.

    hey first find f for both using f=kx x iz same for both then use wd =1/2fx
  16. Y

    Physics MCQs thread.

    its D i think
  17. Y

    Physics MCQs thread.

    have u underdtand now???hatexam??
  18. Y

    Physics MCQs thread.

    ok v1=at1 becoz u=o so fer dist h h=at1*(t2-t1) + 1/2*a*(t2-t1)^2 h=at1t2-at1^2+1/2a(t2^2-2*t1*t2+t2^2) h=-1/2at1^2+1/2at2^2 2h=a(t2^2-t1^2) a=2h/(t2^2-t1^2) option d hope now clear if not come on http://www.facebook.com/yubak.ghimire i will make u more clear
  19. Y

    Physics MCQs thread.

    have u understand hatexam????
  20. Y

    Physics MCQs thread.

    ok then see here v1=at1 becoz u=o so fer dist h h=at1*(t2-t1) + 1/2*a*(t2-t1)^2 so u will solve 2 get a=option d hope u have understand if not i will xplain again clearly with full solution
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