OCR Physics A G484 - The Newtonian World - 11th June 2015

Guess I'll do the same. Thanks



Fair enough; sounds reasonable. Now that you mention on it, if fields/electromagnetism hardest topic (considering it's the most in depth I think you're right); it really isn't too bad - that's a bit reassuring. That said I need to practice the lengthier questions to avoid waffle that can trip me up.

If you don't mind. How has your revision been arranged, as in, after you finished the topics in class did you just start doing past paper after past paper?

Thanks for the reply btw.

Doing it soon.

Did you find it difficult or very easy?

Seems to be the general feeling surrounding g486

My teacher suppose to tell us the result this week, hopefully tomorrow or the latest friday...How about you, what did you get?

i got 8/10, 17/20, 7/10 - so im on 32/40.

I can never do well on evaluative

Can anyone explain how to go about finding the difference in your weight at the equator of the Earth and at the North Pole?
Radius of Earth = 6.4x10^6 m
One day = 8.64x10^4 s
Person = 70kg

Is it a trick question where the difference is 0 N? I know there would be a difference in reality, but I can't think of any Newtonian World knowledge which could answer it.

Yeah it is, I remember that question, if I remember correctly it also says "state" the difference and it's 1 mark

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Is it a trick question where the difference is 0 N? I know there would be a difference in reality, but I can't think of any Newtonian World knowledge which could answer it.

No it's a question in the OCR textbook on the page about gravitational fields.

My teacher explained it to me.

At the North Pole your weight is equal to mg, because you are stood on the axis of rotation so there is no centripetal force.

At the equator, you are not stood on the axis of rotation. Hence you experience circular motion. mg-N=mv^2/r
Solve for N
This is your weight at the equator.

Note the difference between weight and apparent weight. It's unclear really, but by asking for weight it actually wants the apparent weight, because your 'normal' weight is equal to mg - I assume this is why the term weightlessness exists; when experiencing weightlessness, you're weight is of course equal to mg. It is your apparent weight that is 0, as a result of no reaction force being exerted on you.


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Does anybody have the June 2014 Newtonian world paper?

Don't cheat dude.

Don't cheat dude.

Cheat as how? I already did it for my mock in January. I just want to use it for revision.

Believe me, I've got better things to do with my time then cheat for a mock exam. If I did that, I'm only cheating myself because I can't do that in the real exam.

Preach it brah, I believe you, there are youtube videos of people answering the questions but I haven't found a blank transcript of it. I can send you the YouTube links if you want them.

I found out my practical mark. I've got 33/40 and have one more chance at a qualitative to get a maximum of three more marks.
Based on last years UMS conversions, I now need roughly 118/160 or 95% UMS in the exams. I'm so glad the exam grade boundaries are so low.