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# Cambridge Offer Holders 2015 thread watch

1. (Original post by umutalberts)

The solutionbank is extremely unclear and I really cannot understand it!

What have you tried? What don't you get?

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2. (Original post by physicsmaths)
What have you tried? What don't you get?

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This is my working so far. I know the last bit is wrong.

I realise you gotta take moments about O but I don't understand how they found them for C.

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Attached Images

3. (Original post by umutalberts)

The solutionbank is extremely unclear and I really cannot understand it!

Im no expert on TSR but this probably isnt the best place to ask maths questions, but since you've asked here ill post my solution (I hope this is right otherwise its embarrassing )
Hopefully this makes some sense I bashed it out quickly, let me know if there's any issues...

I dont know the method solutionbank used but this one appeared most obvious to me?
Attached Images

4. (Original post by Rjix)
Im no expert on TSR but this probably isnt the best place to ask maths questions, but since you've asked here ill post my solution (I hope this is right otherwise its embarrassing )
Hopefully this makes some sense I bashed it out quickly, let me know if there's any issues...

I dont know the method solutionbank used but this one appeared most obvious to me?
Yeah that's it thanks! I just thought the smartest mathmos would hang out on here.

I still don't understand though how you calculated the moment of C (the trigonometry that got you the expression in terms of sin and cos)

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5. (Original post by umutalberts)
Yeah that's it thanks! I just thought the smartest mathmos would hang out on here.

I still don't understand though how you calculated the moment of C (the trigonometry that got you the expression in terms of sin and cos)

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see where the two dotted lines intersect? Call that point Y.
I considered triangles OBY and triangle BYC, as we know the lengths of the rods and an angle so we can work out the length of the other side using trigonometry since its a right angled triangle (a horizontal line intersects a vertical line hence a right angle)
6. (Original post by Rjix)
see where the two dotted lines intersect? Call that point Y.
I considered triangles OBY and triangle BYC, as we know the lengths of the rods and an angle so we can work out the length of the other side using trigonometry since its a right angled triangle (a horizontal line intersects a vertical line hence a right angle)
Ah yes I get that now. I tried to use simple pythagoras and got it as square root of 10.25(a^2) ie hypotenuse of triangle with sides 2.5a and 5a. But as you can see from my working I didn't know how to progress. Why is what I did not correct?

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7. (Original post by umutalberts)
Ah yes I get that now. I tried to use simple pythagoras and got it as square root of 10.25(a^2) ie hypotenuse of triangle with sides 2.5a and 5a. But as you can see from my working I didn't know how to progress. Why is what I did not correct?

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Its difficult to describe over TSR but its to do with the fact that the line OC isnt actually the hypotenuse of that right angled triangle, its close but not quite, the actual line from C that represents the hypotenuse intersects the rod AB a little bit vertically above O...
8. (Original post by jneill)
Mature student? Many people think they had a terrible interview and get an offer. Good luck for when the post/email/owl arrives

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Yeah Mature student. I had so much prepared, I have been reading like a fool and I completly forgot everything, I sounded like a complete amature. It was so awful.
9. (Original post by Rjix)
Its difficult to describe over TSR but its to do with the fact that the line OC isnt actually the hypotenuse of that right angled triangle, its close but not quite, the actual line from C that represents the hypotenuse intersects the rod AB a little bit vertically above O...
Why??

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10. (Original post by umutalberts)
Why??

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C is NOT on the same horizontal level as O. This would be true if the length OA = the length AC as it would have "gone up" just as much as it "came down" if that makes sense.
If C were on the same horizontal level as O then yeah pythagoras would be a perfectly fine argument for calculating the distance
11. (Original post by Rjix)
C is NOT on the same horizontal level as O. This would be true if the length OA = the length AC as it would have "gone up" just as much as it "came down" if that makes sense.
If C were on the same horizontal level as O then yeah pythagoras would be a perfectly fine argument for calculating the distance
But can't you just draw a line connecting O and C and use pythagoras?

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12. (Original post by umutalberts)
But can't you just draw a line connecting O and C and use pythagoras?

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no because that wouldn't be perpendicular to the force acting through c, and its meant to be the perpendicular distance
13. Anyone planning on studying drama at aru?

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14. (Original post by Ryan.p20)
Anyone planning on studying drama at aru?

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I guess you're technically not in the wrong thread, because AR offer holders are Cambridge offer holders (as the title suggests).

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15. Rejected from Warwick...

:'(
16. (Original post by EHZ17)
Rejected from Warwick...

:'(
Are you actually joking ???? I'm so confused, they've been really erratic with their offers this year seemingly
17. (Original post by EHZ17)
Rejected from Warwick...

:'(
How? Dw you got LSE and Cambridge.

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18. (Original post by NinjaPandaa)
Are you actually joking ???? I'm so confused, they've been really erratic with their offers this year seemingly
Nah, just got the rejection today :/

(Original post by physicsmaths)
How? Dw you got LSE and Cambridge.

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I did send them a fairly blunt email asking if I will get a reply before the deadline on the 31st and the next day they rejected me. I really despise Warwick for their handling of it. I don't mean to be arrogant but I can't see why I got rejected... unless they valued a C at GCSE and a low A at AS quite heavily? :P
19. (Original post by EHZ17)
Nah, just got the rejection today :/

I did send them a fairly blunt email asking if I will get a reply before the deadline on the 31st and the next day they rejected me. I really despise Warwick for their handling of it. I don't mean to be arrogant but I can't see why I got rejected... unless they valued a C at GCSE and a low A at AS quite heavily? :P
What course? Economics im guessing?

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20. (Original post by EHZ17)
Nah, just got the rejection today :/

I did send them a fairly blunt email asking if I will get a reply before the deadline on the 31st and the next day they rejected me. I really despise Warwick for their handling of it. I don't mean to be arrogant but I can't see why I got rejected... unless they valued a C at GCSE and a low A at AS quite heavily? :P
Dw i got a rejection too

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