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Official OCR A G481 mechanics 20th May 2013

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The resultant weight acts vertically downwards and not perpendicular to the plane. The question essentially asked you to resolve the weight into components; both parallel and perpendicular to the slope.

I've tried to explain it using another diagram, like I said, you are right that perpendicular to the slope is cos90 or sin0, but the weight has components both parallel and perpendicular, therefore you won't use 0 or 90 degrees.

The downwards arrow you drew there IS perpendicular because it is at 90 degrees. But the one in your original is not. Hopefully my diagram shows what I mean

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Reply 641

Sam_Coburn

Original post by OllieGCSEs

I do understand your point, but if every question was answerable by just doing all previous past papers then a lot of people (too many) would be getting full marks, and the tests would seem too easy - exams have to try and force the people sitting to think 'outside the box'. I'm sorry it tripped you, I'm sure it caught a lot of other people out too.

Yep, Just a shame they decided to change the style of it, that's all, just unlucky I guess. And thanks, take it easy.

Reply 642

madrevision

Original post by ss2012

I did but I failed stats so I dropped the whole a level cz I refused to retake the stats module. I'm starting to regret that now

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hmm what are your other subjects besides physics and chemistry ?

Reply 643

ss2012

I have psychology photography which I took as a hobby and a language as level

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Reply 644

ss2012

Original post by ss2012

I have psychology photography which I took as a hobby and a language as level

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Original post by madrevision

hmm what are your other subjects besides physics and chemistry ?

sorry my phone didn't seem to quote you when I tried to reply

Reply 645

madrevision

Original post by ss2012

sorry my phone didn't seem to quote you when I tried to reply

Mmm the psychology and the language are good because the language (if it's foreign shows you can retain a lot of info but i'm not sure if it would be competitive to have chemistry a language and psychology - you should check some top unis for chemistry and see what they're looking for. try east Anglia, aston, bath, Nottingham and ucl is good as well :smile:

Reply 646

calalallum

does anyone have the unnoficial mark scheme yet?

Reply 647

madrevision

Original post by calalallum

does anyone have the unnoficial mark scheme yet?

it was posted like 5 hours after the exam... have a look about 5-6 pages back or search on google

Reply 648

Hannahm1995

Original post by calalallum

does anyone have the unnoficial mark scheme yet?

http://www.thestudentroom.co.uk/showthread.php?t=2357551

Hope that works :smile:

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Reply 649

Hannahm1995

Is there a thread for unit 2?

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Reply 650

OllieGCSEs

Original post by Hannahm1995

Is there a thread for unit 2?

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I made one yesterday or two days ago but it got no responses haha, some people might think it's a bit early, or no one was interested

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Reply 651

Hannahm1995

Original post by OllieGCSEs

I made one yesterday or two days ago but it got no responses haha, some people might think it's a bit early, or no one was interested

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Okay! Thank you!

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