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  1. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    ok first say intial speed is u decelration is a and distance given is x using equations of motion with only data given we use v^2=u^2 +2as rearrange it to make s the subject s= v^2 - u^2/2a | since v is zero i will omit it so -u^2/2a = x for an increase by 20% it is like mulitplying...
  2. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    :S y not
  3. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    frequency = 1/T and definition of frequency is how many cycles per second and we got 50revolutions per second so i found the time period which is 0.02 so 1 wavelength takes 0.02s to complete so i we use 0.01 we can see half the wave
  4. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    because one tube was closed while the other is open and they said find ratio
  5. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    3000 rev in 1 minute so in 1 sec = (3000/60) =50 50 rev per second now this is the frequency so period is 1/50 which is 0.02 so 1 wavelength takes 0.02s so to get a good shape 0.01 should be used to show have the wave as well so answer is B
  6. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    well according to my physics book f=v/4l is used in closed end tubes and f=v/2l in open end tubes
  7. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    but if you re-arrange the forces in D you get a couple but for A it is being pulled downards
  8. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    that is a potentiometer anways see these notes
  9. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    Po=hdg when child is not drinking so pressure in straw equals air pressure child can lower the pressure (which is air obvioulsy) by 10% which is 1/10 so Po/10 =hdg rearrange to get h=Po/10dg
  10. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    look at number of units in question it is 3 so your answer should only contain 3 units not more
  11. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    Q10 answer is D because it is falling through air so will encounter a deceleration as it reaches terminal velocity while A has a steady speed for a while which is impossible Q13 are you sure the answer is A? because it looks like it is D for me Q22 you should just memorize this there is...
  12. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    which one ?????
  13. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    if you have the mark scheme i can help you then
  14. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    when adding or subtracting 2 quantities add absolute error when mulitplying or dividing add percentage error when a quantity is to the power of something multiply power to percentage error
  15. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

  16. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    btw u missed part of the question abt PE of Q which is less than P by 50kj ok so use the equation PE = KE + WD ( i am omitting the kilo unit so it faster to calculate) at Q: P-50 = KE +10 but we don't know P so for P: PE= KE +WD and work done from P to Qis 10 so PE is 5 so P=15...
  17. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    answer is B right?
  18. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    i remember doing question with my teacher and he said there is something missing in the information given so we weren't able to do it Q25 use equation f=v/4l for closed tube and f=v/2l for open tube where v is a constant speed of air in this case so f ' =v/2l and f=v/4l divide f ' by f to...
  19. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    i know that mass and energy are not sure what isn't
  20. bloody_mary

    AS Physics P1 MCQs Preparation Thread.

    answer is C because T is the largest becasue if you look closely you will see it it near to the pivot and due to it being near requires more force to lift the door as well as it is at an angle so requires more even force H is second larget because it supporting the door (reaction force) and is...
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