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Edexcel International A level (IAL): Physics Unit 6 (WPH06) - 19th May, 2016 - PM Watch

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    i got the time period as 3.20 seconds and the next question about the equilibrium as 0.80 seconds. Are any of these correct? for the uncertainty in the first question i got 2.2%
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    (Original post by Owais.ik)
    For the uncertainity in question 1 I found the max possible value of W1 minus minimum possible value . and then divide by 2
    I got something like 0.015N
    I did the same!!
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    Did anybody get the acceleration at 0.4 s to be 1.96 ms^-2 ?
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    (Original post by ab9826)
    i got the time period as 3.20 seconds and the next question about the equilibrium as 0.80 seconds. Are any of these correct? for the uncertainty in the first question i got 2.2%
    All three correct.
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    (Original post by ab9826)
    i got the time period as 3.20 seconds and the next question about the equilibrium as 0.80 seconds. Are any of these correct? for the uncertainty in the first question i got 2.2%
    Same
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    (Original post by Sandy_Vega30)
    Did anybody get the acceleration at 0.4 s to be 1.96 ms^-2 ?
    I got 2 ms^-2
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    Will the p.d. across capacitor X drop to zero after it discharges through capacitor Y for some time? So what reading shoud we take as V2?
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    Q4: I forgot to convert Celsius into Kelvinfffffffffuuuuuuuuu
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    (Original post by AvWOW)
    I wrote the same precaution (connecting the capacitor to the correct terminals) but I wrote repeat and find mean for accuracy... It might be wrong cause you don't repeat for circuits normally as it could heatup right? smh
    I wrote repeat and average after cooling the setup!
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    (Original post by Sandy_Vega30)
    Did anybody get the acceleration at 0.4 s to be 1.96 ms^-2 ?
    I got 2m/s... btw what did you write for why was the line horizontal at 0.80 m/s in v-t graph?
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    If anyone manages to get hold of the exam paper, could you please link me to it?
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    How do you calculate the total percentage uncertainity in that density of clay question? Do you just add the percentage uncertainities?
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    (Original post by Aimen.)
    I got 2m/s... btw what did you write for why was the line horizontal at 0.80 m/s in v-t graph?
    I wrote that at 0.8 s the mass experiences max. Velocity, therefore a horizontal tangent could be used to calculate max. acceleration. I don't think that's right though.
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    (Original post by ab9826)
    i got the time period as 3.20 seconds and the next question about the equilibrium as 0.80 seconds. Are any of these correct? for the uncertainty in the first question i got 2.2%
    Yess I got the same 🎉🎊 but I dont remember % uncertainty value. 😞
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    (Original post by Sandy_Vega30)
    I wrote that at 0.8 s the mass experiences max. Velocity, therefore a horizontal tangent could be used to calculate max. acceleration. I don't think that's right though.
    Acceleration is always zero at max. velocity.
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    (Original post by Aimen.)
    Acceleration is always zero at max. velocity.
    What did you writet?
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    (Original post by Sandy_Vega30)
    What did you writet?
    I wrote velocity is maximum at 0.80 m/s^2 so the gradient is horizontal and acceleration=0 ms^-2
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    (Original post by Aimen.)
    I wrote velocity is maximum at 0.80 m/s^2 so the gradient is horizontal and acceleration=0 ms^-2
    That makes so much sense!
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    for question no. 4 my value of gradient was 1061 which is wrong but will i get carry forward marks for the next questions ??
    • Welcome Squad
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    Welcome Squad
    (Original post by Aimen.)
    I wrote velocity is maximum at 0.80 m/s^2 so the gradient is horizontal and acceleration=0 ms^-2
    Correct. Acceleration is proportional to displacement: at t=0.80s, (wait not v=0.80ms^-1) its at center oscillation - displacement is zero so acceleration is zero and the tangent (dv/dt) = zero

    I screwed up everything else tho. ggwp
 
 
 
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