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Struggling with revising for Physics Watch

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    (Original post by Cherry82)
    Thanks, in short, things on Motion, Forces and Energy.
    I'm ok with the theory aspects but when it comes to calculations and figuring out what to do using principles etc, I kind of go blank a bit.
    Are you using the formula booklet? Just writing down the formulas you see in the booklet that you think may be related to the question might trigger something
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    (Original post by victoria98)
    Ok I'm not very good at explaining but I'll try my best.
    (a) You are told that the original length of the spring is 2cm. So the extension must be 6cm or 0.06m. Use the formula F=kx and rearrange to make k the subject. k=3/0.06= 50.

    (b)(i) For this part you want to work out the potential energy when the spring is in equilibrium and the potential energy when the spring isn't in equilibrium (i.e. use fig 7.2). Use E=0.5kx^2. Fig 7.1 E= 0.5 x 50 x 0.06^2 = 0.09 J. Fig 7.2 E= 0.5 x 50 x 0.1^2= 0.25 J. The difference between the two is 0.25-0.09=0.16 J and that's your answer.

    (ii). This one is weird. For the spring to be in equilibrium in fig 7.1 there must be a force of 3N acting in the upwards direction (opposite weight) so that the resultant force is 0N, yes? The spring in fig 7.2 is NO LONGER IN EQUILIBRIUM. There's still a force acting in the opposite direction to weight, but it no longer is equal to weight. Use F=kx to work out what it is F= 50 x 0.1 = 5N. The upwards force is 5N, weight is 3N so the resultant force is 5-3=2N (take them away since they act in opposite directions). You can now use F=ma to work out what the acceleration is. Mass= 3/9.8 (from W=mg) a= F/m => 2/(3/9.1) which comes to 6.5 ms^-2.

    Let me know if this doesn't make sense!
    THANK YOU!
    I understand a good deal now. I still feel like I may fail mechanics, I want to start my whole year again. I hate cramming, doing this in a week is super tough.
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    (Original post by Its Jack)
    Are you using the formula booklet? Just writing down the formulas you see in the booklet that you think may be related to the question might trigger something
    Yea, I have the formula booklet but I think it's because I can't be so sure on what is coming up that's why I am a bit nervous. I'm afraid to go blank in the exam room or get so stuck that I don't know how to make my way through questions.
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    (Original post by Smug Life)
    Vector
    Scalar
    Displacement
    Instantaneous Speed
    Average Speed
    Velocity
    Acceleration
    Newton
    Terminal Velocity
    Centre of Gravity
    Torque of Couple
    Moment
    Thinking, braking and stopping distance
    Work Done
    Joule
    Watt
    Conservation of Energy Principle
    Power
    Stress
    Strain
    Young's Modulus
    Elastic Deformation
    Plastic Deformation
    Elastic Limit
    Ultimate Tensile Strength

    I think that's all.
    Thanks, I need to remind myself of Elastic and Plastic deformation.
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    (Original post by Cherry82)
    Thanks, I need to remind myself of Elastic and Plastic deformation.
    Types of deformation where the material does or does not return to it's original shape when the deforming force is removed. Plastic means it does not.
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    (Original post by Cherry82)
    http://www.mediafire.com/view/frs1nm...1-01_Jun14.pdf

    Here's the link. I was lucky to have someone kindly post it here.
    Do you by any chance have the mark scheme?
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    (Original post by Angelo12231)
    Do you by any chance have the mark scheme?
    Yea, a guy sent a link of all the papers from last year:

    https://www.mediafire.com/folder/p2jf5nrw7p2cqb7,frs1nme7xoe3zzm, 2ln99twglulpjl7,8o9qezz21372d6v/shared
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    Thinking, braking and stopping distance
    Work Done
    Joule
    Watt
    Conservation of Energy Principle
    Power
    Stress
    Strain
    Young's Modulus
    Elastic Deformation
    Plastic Deformation
    Elastic Limit
    Ultimate Tensile Strength
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    Thanks a lot
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    (Original post by Cherry82)
    I don't know why but I could never feel confident with studying for Physics. Thank God for M1 in maths as it really helped with certain concepts but my first exam is on the 19th May and I still need to learn Chapter 4 to 8 for Mechanics. I don't know the best way to prepare for mechanics. I only have a week and it seems that I am only getting marks in the definitions and simple areas. I'm barely scrapping an E.
    At this rate, it's getting frustrating. I'm using the textbook to study even, maybe that's the problem- as I need the theory first I thought book first, past papers later but once I try the past papers, I get confused.
    What part do you find confusing?

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    What did you guys get on controlled assessment?

    I got 10/10, 17/20 and 8/10 (35/40)

    Hopefully an A is still 34+/-
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    (Original post by Angelo12231)
    What did you guys get on controlled assessment?

    I got 10/10, 17/20 and 8/10 (35/40)

    Hopefully an A is still 34+/-
    I flopped mine and got 29 in total
    I need to get 80-90 in G482 to hopefuly secure an A while right now i get about 55-60 out of 100
    While in G481 i get about 46-50 marks

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    (Original post by Azarashi)
    Are you doing AQA?
    Hi, I'm doing AQA and really struggling.
    Do you have any advice on how to do the electricity questions in unit 1, the unit 2 exam and unit 4?
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    (Original post by ProNoob)
    I flopped mine and got 29 in total
    I need to get 80-90 in G482 to hopefuly secure an A while right now i get about 55-60 out of 100
    While in G481 i get about 46-50 marks

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    Mate that G481 june 2014 paper is deadly... Ive struggled with it, whilst the other papers are not so bad... Hopefully its not like that this year
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    (Original post by Angelo12231)
    Mate that G481 june 2014 paper is deadly... Ive struggled with it, whilst the other papers are not so bad... Hopefully its not like that this year
    I got 10/10 14/20 and the other is depending as I was told I needed to take it again so I guess I did terrible in that one. Ah, man I hate practicals- studying for them and preparing for them seems like the worst as I never actually know what to shift my focus on.
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    (Original post by Angelo12231)
    Mate that G481 june 2014 paper is deadly... Ive struggled with it, whilst the other papers are not so bad... Hopefully its not like that this year
    I also struggled with it
    Lets hope that OCR are focusing too much on the new spec so make this paper easier

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    (Original post by Angelo12231)
    What did you guys get on controlled assessment?

    I got 10/10, 17/20 and 8/10 (35/40)

    Hopefully an A is still 34+/-
    I got 9/10, 18/20 and 8/10 so 35/40 like you. Wasn't that an A last year? I have a feeling it might not be this time around.... How did you do in your other science controlled assessments?
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    (Original post by Cherry82)
    I don't know why but I could never feel confident with studying for Physics. Thank God for M1 in maths as it really helped with certain concepts but my first exam is on the 19th May and I still need to learn Chapter 4 to 8 for Mechanics. I don't know the best way to prepare for mechanics. I only have a week and it seems that I am only getting marks in the definitions and simple areas. I'm barely scrapping an E.
    At this rate, it's getting frustrating. I'm using the textbook to study even, maybe that's the problem- as I need the theory first I thought book first, past papers later but once I try the past papers, I get confused.
    I'm doing OCR too, my god that exam board is rubbish. We haven't even been given the text books by m school so I'd assume that they aren't that great. I suggest working through the past papers with the mark scheme by your side, and making a list of all the topics/ questions you are dropping marks on, then take this list to your teacher, with the questions and getting them to work through the questions with you. There are only so many questions they can ask you so if you do past papers you should do ok.

    I don't want to be that person but I am on track for an A (fingers crossed!) and I have really struggled with physics but don't worry, you can work your way up!.
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    I feel you bruh


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    (Original post by sophierwilson)
    I'm doing OCR too, my god that exam board is rubbish. We haven't even been given the text books by m school so I'd assume that they aren't that great. I suggest working through the past papers with the mark scheme by your side, and making a list of all the topics/ questions you are dropping marks on, then take this list to your teacher, with the questions and getting them to work through the questions with you. There are only so many questions they can ask you so if you do past papers you should do ok.

    I don't want to be that person but I am on track for an A (fingers crossed!) and I have really struggled with physics but don't worry, you can work your way up!.
    Woah Really, so how did you guys make notes? I want to try just using past papers but I think I still have a lot to learn in the terms of after looking at the physicsmathstutor's notes lol I didn't understand a lot on there which is why I keep returning to the book because his notes are based on the books. Do you have any suggestions or alternatives. Our exam is next week and if I am honest- I think overall in Physics I may get E grade. Maybe I'm being pessimistic but I don't think I've mastered anything- if I was lucky, I'd remember things here and there. I hope you get the A grade People on TSR work so hard, it always shakes me.
 
 
 
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