Official OCR Physics A G481 24th May June 2016

Oh, and what was up with the "breaking stress" experiment? I had to rush like hell to do this one because I left it until after I'd checked the rest of the paper... Something to do with increasing the load until the plate fractured (using standard measurements)?

Reply 42

sadych

Original post by jadiowaves

Did anyone else get approx 23 cars for the motorcyclist jump question?

yeah I got 23, 42/1.8 or something

Reply 43

jadiowaves

Original post by AlistairMcDonald

Oh no! I've just realised that the only people who are gonna be doing this exam are resitting! These grade boundaries gonna be rough!

I really hope they scale them based on data from last year (or at least with them in mind). It doesn't seem fair setting the grade boundaries using scores from 100% re-sitters... 2 years in the making, relatively we'll all have done ok 😂

Reply 44

Does anyone remember what happens to the force at X if the cyclists leans forward?
Overall good exam.

Reply 45

tch123456

Original post by cookie_raider01

Does anyone remember what happens to the force at X if the cyclists leans forward?
Overall good exam.

pretty sure it decreases because distance has increased, moments stay the same so force decreases?

Reply 46

sadych

Original post by jadiowaves

I really hope they scale them based on data from last year (or at least with them in mind). It doesn't seem fair setting the grade boundaries using scores from 100% re-sitters... 2 years in the making, relatively we'll all have done ok 😂

Remember that you wont gen any geniuses resitting as they would have got high UMS last year, so that will hopefully lead to a positive impact on grade boundaries

Reply 47

yeah thanks alot.
Also, do you lose all four marks if you don't divide by 4 in the stress strain question where you had to work out the extension.
I didn't divide by four but could i pick up some method marks though?

Reply 48

thad33

12

I would've actually preferred the exam to be really hard. Easy exam means the smallest mistakes lose you big UMS. At least an A on it though I think

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Reply 49

sadych

[video]https://youtu.be/ecyZSab1fKw[/video]

Reply 50

Daribig

Reckon you'd get ecf in part 2 of the questions about the relationship between u and x. I put u=2x as opposed to u=x^2.

Reply 51

probably as you have calculated k wrong.
But you get 1 mark if you get the thinking distance correct.
Did you get 18 m as thinking distance?

Reply 52

umarq786

Is there any unofficial mark scheme that will be made for this paper, if not what did you guys get for the extension of wires on the last question? I got 23 as it was asking for an answer in mm even though the information was given in metres

Reply 53

thad33

12

Original post by cookie_raider01

yeah thanks alot.
Also, do you lose all four marks if you don't divide by 4 in the stress strain question where you had to work out the extension.
I didn't divide by four but could i pick up some method marks though?

It all depends if dividing by four was an M1 mark, anything after that would've been lost but otherwise you'll get ecf marks

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Reply 54

Original post by umarq786

Is there any unofficial mark scheme that will be made for this paper, if not what did you guys get for the extension of wires on the last question? I got 23 as it was asking for an answer in mm even though the information was given in metres

yes you had to convert into mm and the answer was 23mm

Reply 55

thad33

12

Original post by umarq786

Is there any unofficial mark scheme that will be made for this paper, if not what did you guys get for the extension of wires on the last question? I got 23 as it was asking for an answer in mm even though the information was given in metres

It was 23 yes

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Reply 56

LukeJonno

Seemed pretty easy, 22.8 or something like that mm in the extension of the wires, and 22 motorbike could jump, 90m stopping distance ??? , 0.15 seconds of blood moving in arteries. 500 and something for the force upwards. Hoping for 55 or higher.

Reply 57