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

a123a
Badges: 12
Rep:
?
#1481
Report 3 years ago
#1481
(Original post by SH0405)
Although the first couple of questions were a bit iffy, the paper overall wasn't too bad; almost, dare I say it, easy. I would say the boundaries will be as follows;

100% UMS: 52
90% UMS: 45
A: 40
B: 36
C: 32
D: 29
E: 24
That seems fair, but shouldn't 100%ums be 50 according to those A and A* grade boundaries?
0
reply
Elcor
Badges: 13
Rep:
?
#1482
Report 3 years ago
#1482
(Original post by a123a)
Last year was 39 for A 43 for A* and I'm guessing 47 for 90ums? So if you say this paper was harder than last years I expect the grade boundaries to be similar. So hopefully we both have full ums.
I think the boundaries will be higher than last year but still below average.

Posted from TSR Mobile
0
reply
a123a
Badges: 12
Rep:
?
#1483
Report 3 years ago
#1483
(Original post by olil1996)
Yeah, I think that would probably get a mark, what did you get as your final answer?
That's good. I can't remember exactly but I know it wasn't 1.5x10^7.
0
reply
rachelc142
Badges: 11
Rep:
?
#1484
Report 3 years ago
#1484
(Original post by randlemcmurphy)
Anyone think the exam got easier as it went on?
definitely ! Q1 & 2 were odd. rest was ok.
felt like the resonance question was disguised well.

Posted from TSR Mobile
0
reply
HMusa
Badges: 1
Rep:
?
#1485
Report 3 years ago
#1485
What the actual **** was that? I checked the front page of my paper 3 times during the exam to make sure I was doing the right paper fml
2
reply
steffanwb
Badges: 1
Rep:
?
#1486
Report 3 years ago
#1486
That first question really threw me off, no idea how I did because of that. Gotta make up for it in G485 now!
0
reply
[email protected]
Badges: 9
#1487
Report 3 years ago
#1487
(Original post by rachelc142)
definitely ! Q1 & 2 were odd. rest was ok.
felt like the resonance question was disguised well.

Posted from TSR Mobile
I agree

Posted from TSR Mobile
reply
a123a
Badges: 12
Rep:
?
#1488
Report 3 years ago
#1488
(Original post by Elcor)
I think the boundaries will be higher than last year but still below average.

Posted from TSR Mobile
Yeah I agree with that.
0
reply
SH0405
Badges: 13
Rep:
?
#1489
Report 3 years ago
#1489
(Original post by a123a)
That seems fair, but shouldn't 100%ums be 50 according to those A and A* grade boundaries?
Technically, yes. I'm sorry.
0
reply
kateyl
Badges: 3
Rep:
?
#1490
Report 3 years ago
#1490
(Original post by Elcor)
For the second the period is constant but the amplitude decreases over time

Posted from TSR Mobile
Crap, I didn't put the amplitude decreasing over time but I just drew a second sinusoidal graph with a lower amplitude/max velocity (forgot what was on the y axis), would that get me one mark?
0
reply
JoeMartin
Badges: 0
Rep:
?
#1491
Report 3 years ago
#1491
Does anyone actually have an answer for the first question? I was sitting there like I swearrr that students right and I can definately not think of TWO reasons otherwise. Made some stuff up about forces acting from the same point in the end
0
reply
Elcor
Badges: 13
Rep:
?
#1492
Report 3 years ago
#1492
(Original post by kateyl)
Crap, I didn't put the amplitude decreasing over time but I just drew a second sinusoidal graph with a lower amplitude/max velocity (forgot what was on the y axis), would that get me one mark?
Probably 1/3

Posted from TSR Mobile
0
reply
Bjc00
Badges: 2
Rep:
?
#1493
Report 3 years ago
#1493
anyone say energy lost was due to light because it was a laser, so took more time
0
reply
alanconnel
Badges: 4
Rep:
?
#1494
Report 3 years ago
#1494
for the inital acceleration i can remeber what i got but i did mass times by velocity then divided by 1/rate or what ever it said. then used f=ma to calculate acceleration
0
reply
Tazmain
Badges: 8
Rep:
?
#1495
Report 3 years ago
#1495
(Original post by kateyl)
Crap, I didn't put the amplitude decreasing over time but I just drew a second sinusoidal graph with a lower amplitude/max velocity (forgot what was on the y axis), would that get me one mark?
That's what I did, thought because it was a constant force, amplitude would be lower, but not decreasing...
0
reply
BrokenS0ulz
Badges: 3
Rep:
?
#1496
Report 3 years ago
#1496
(Original post by JoeMartin)
Does anyone actually have an answer for the first question? I was sitting there like I swearrr that students right and I can definately not think of TWO reasons otherwise. Made some stuff up about forces acting from the same point in the end
idk I put that N and W are not the same type of force. They needed to be the same type to obey newton's third law.
0
reply
L'Evil Fish
Badges: 18
Rep:
?
#1497
Report Thread starter 3 years ago
#1497
I said photo electric effect...

G482 knowledge right there
0
reply
Sam596
Badges: 2
Rep:
?
#1498
Report 3 years ago
#1498
(Original post by JoeMartin)
Does anyone actually have an answer for the first question? I was sitting there like I swearrr that students right and I can definately not think of TWO reasons otherwise. Made some stuff up about forces acting from the same point in the end
The equal and opposite reaction force must be the same type of force (i.e. not one a normal reaction and one a weight) and also must be acting on a different body
0
reply
The Room Student
Badges: 2
Rep:
?
#1499
Report 3 years ago
#1499
(Original post by Tazmain)
That's what I did, thought because it was a constant force, amplitude would be lower, but not decreasing...
If there's a constant resistive force then there's a constant deceleration.

If there's a constant deceleration then, well I'm pretty sure, the amplitude decays exponentially with time.
1
reply
Bjc00
Badges: 2
Rep:
?
#1500
Report 3 years ago
#1500
(Original post by L'Evil Fish)
I said photo electric effect...

G482 knowledge right there
was thinking that but if you're giving electrons energy then thats surely heating as well
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cranfield University
    Cranfield Forensic MSc Programme Open Day Postgraduate
    Thu, 25 Apr '19
  • University of the Arts London
    Open day: MA Footwear and MA Fashion Artefact Postgraduate
    Thu, 25 Apr '19
  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (443)
37.83%
No - but I will (88)
7.51%
No - I don't want to (80)
6.83%
No - I can't vote (<18, not in UK, etc) (560)
47.82%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise