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  1. TaffsAsLevel

    how was phy p11

    I know its lengthy, I guessed three but all are sure correct because I did them before, especially the densities and the kinematics, also waves and the orbital electron should be C because it absorbs rather than emits which is just the opposite of beta emission
  2. TaffsAsLevel

    how was phy p11

    Paper was easy =S why a lot of people seem to screw up, I am sure of 35 marks out of 40 alot repeated especially there is a tricky question and I tackled it
  3. TaffsAsLevel

    Physics: Post your doubts here!

    Two springs P and Q both obey Hooke’s law. They have spring constants 2k and k respectively. The springs are stretched, separately, by a force that is gradually increased from zero up to a certain maximum value, the same for each spring. The work done in stretching spring P is WP, and the work...
  4. TaffsAsLevel

    Physics: Post your doubts here!

    Awwww, here ;)
  5. TaffsAsLevel

    Physics: Post your doubts here!

    from s=ut+o.5at^2 consider XY and XZ motion
  6. TaffsAsLevel

    Physics: Post your doubts here!

    40=12v+72a 80=18v+162a let v subject find a :) s=ut+1/2 at^2
  7. TaffsAsLevel

    Physics: Post your doubts here!

    I think OCT 2010 question 22 would be A because you will be weighing smaller mass so the less stiff spring will need to act (more sensitive) that's why its on top so that it is first to be determined by the balance, then when it is heavier the string will stretch and it will be too much so the...
  8. TaffsAsLevel

    Physics: Post your doubts here!

    WOOW THAANK YOU :D:D:D:D I can't believe it should be that simple, I mean, I used YZ XZ and XY with all forms of equation silly me :unsure::p
  9. TaffsAsLevel

    Physics: Post your doubts here!

    Hi, would you mind solving november 2010 paper 12 QUEStion 8. It seems impossible please help
  10. TaffsAsLevel

    Physics: Post your doubts here!

    Atleast show your workings so I can spot your mistake
  11. TaffsAsLevel

    PHY MCQ helpppp!!!!

    Hi but why isn't that 2h/(t2-t1)^2 because that is the time between h anyways? Please help
  12. TaffsAsLevel

    Physics: Post your doubts here!

    Okay, you should know what voltage stands for it is potential DIFFERENCE, so.. You have a 12 V from P to Q, and you know that you are seeing a parallel circuit so voltage is same. Now we need to know the p.d at Q, we can use a voltage division? so that you will get 4V, so what you have left? 8...
  13. TaffsAsLevel

    Physics: Post your doubts here!

    It is 10 I just did that few days ago, ok I will give you my working and you try see your problem. square root of[(10cos30)^2 + (10-10sin30)^2)] check you get 10 N, if you don't understand my working then you don't know resolving forces or maybe you didn't recognize the angle just because 120...
  14. TaffsAsLevel

    Physics: Post your doubts here!

    For q3. I'll tell you a method if they ask for resultant, choose an axis, let's say y vertical and x is horizontal. I hope till that part you know how to resolve the forces. Then if you know, get the resultant of the forces that is parallel to the y axis and then the same for the x axis. Now use...
  15. TaffsAsLevel

    AS Physics P1 MCQs Preparation Thread.

    Preps fine just momentum is a bit confusing when it comes to sign and directions. I don't do yearly I do it chapter by chapter. How about you?
  16. TaffsAsLevel

    AS Physics P1 MCQs Preparation Thread.

    If a spring is in parallel won't they be more stiff? usually they give identical spring so it is easier, so if 2 springs on parallel their stiffness doubles and the extension just inverse it so 1/2 x, it is the opposite for series where you add the all the x and find inverse of k ;)
  17. TaffsAsLevel

    AS Physics P1 MCQs Preparation Thread.

    Okay so this problem is like parallel and series circuit. just imagine extension as resistors, and if you want overall k then find inverse of overall x. or otherwise the otherway if parallel then k would all add up for overall k. You do it yourself now and see if you got correct
  18. TaffsAsLevel

    Physics: Post your doubts here!

    Speed is 2 ms^-1 is only for the 2 kg trolley See, this is a momentum problem and we know the initial momentum is zero so the right equals the left (this is similar to explosion momentum) therefore m1v1=m2v2 if you see that m and v are inversely proportional so if the m2/m1=2 (you see its 2kg...
  19. TaffsAsLevel

    Physics: Post your doubts here!

    For 15 ElasticPE is converted to KE and it moves both sides so more stretched it adds up. So add both KE that is the EPE stored then For 13, T=F=3/0.05=60N so torque at P is 60x0.075 Nm I took the radius because wheel Q is driven from the centre so from that point to the top of wheel Q are the...
  20. TaffsAsLevel

    Physics: Post your doubts here!

    Any body here have the notes and equations for elastic collision of both equal and unequal mass?
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