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

3 years ago
#1761
(Original post by Josh771)
Still ECF though no matte the answer everyone I talked to after the exam got the same as me using the N system, but fingers crossed for low boundaries!! I got extreamely excited when I read the first question as I'd spent 10 minutes before the exam explaining how it works with something on a table to everyone!!!
You actually knew how to answer the first question?! I left it til last and babbled about how the student was talking about the weight but the weight varies depending on its position in the gravitational field blah blah blah and that the actual opposite force is from the centre of gravity of the moon... It was my "Ladies, you have 5 minutes left" panic scribble!
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3 years ago
#1762
(Original post by Josh771)
Ahhh well, everyone I talked to did the same as me so at least I'm not the only one! Still, the rest of the paper seemed to be ok, and hopefully a load of ECF marks for the weird bits
Everyone I talked to used both volumes so at least I am not the only one! Someone upload paper so we can see who is right!
3 years ago
#1763
teacher teacher cool, where are you?
0
3 years ago
#1764
(Original post by maya997)
What did people get for the time of the photons question?
very small value I believe, can't remember exactrly
0
3 years ago
#1765
(Original post by maya997)
What did people get for the time of the photons question?
Something really tiny, in the order of 1000th of a second
0
3 years ago
#1766
(Original post by rachelc142)

I ended up with this too. My friend did KE = WD so 1/2 m. v^2 = Fs
I did SUVAT so didnt have an M in miine??!!
3 years ago
#1767
(Original post by verello12)
very small value I believe, can't remember exactrly
I recall 2ms ish?
0
3 years ago
#1768
(Original post by maya997)
What did people get for the time of the photons question?
I think it was around 2 = 10^-3

(Original post by tory_lee_x)
Out of interest, how many people who sat the exam today do maths? What are you guys applying for Uni to do? I don't do maths (I hate it) and I've got a place to study veterinary medicine
me, and further maths, applied for physics :-)
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3 years ago
#1769

I did SUVAT so didnt have an M in miine??!!
I did suvat too and ended up with weird trig. I think this was the wrong thing to do tbh. Conservation of energy seemed to work much better!
0
3 years ago
#1770
(Original post by tory_lee_x)
You actually knew how to answer the first question?! I left it til last and babbled about how the student was talking about the weight but the weight varies depending on its position in the gravitational field blah blah blah and that the actual opposite force is from the centre of gravity of the moon... It was my "Ladies, you have 5 minutes left" panic scribble!
Ahah yeah I hope so at least, its because the force acting on the equipment by the surface is a reaction to the force due to the interaction with the equipment and the surface and not the weight on the surface. Also it needs to be the same type of force, and the weight isn't an attractive force. The reaction to the weight would be a frictional force I think
0
3 years ago
#1771

I did SUVAT so didnt have an M in miine??!!
Suvat is the correct method and the distance should not be dependent on the mass.

d=u^2sin(2Î¸)/g
0
3 years ago
#1772
(Original post by rachelc142)
I did suvat too and ended up with weird trig. I think this was the wrong thing to do tbh. Conservation of energy seemed to work much better!
How did you do that?
0
#1773
(Original post by rachelc142)
where is he?!??!! :-(

I did the former

I ended up with this too. My friend did KE = WD so 1/2 m. v^2 = Fs

Will probably type it up when he's at home
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3 years ago
#1774
(Original post by suprisefish)
Suvat is the correct method and the distance should not be dependent on the mass.

d=u^2sin(2Î¸)/g
Oh I got d=U^2cosOsinO/g
3 years ago
#1775
(Original post by Elcor)
How did you do that?
my friend did 1/2 mv^2 = force x distance
0
3 years ago
#1776

Oh I got d=U^2cosOsinO/g
you seem to be missing a 2. 2sinÎ¸cosÎ¸ = sin2Î¸
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3 years ago
#1777
(Original post by rachelc142)
my friend did 1/2 mv^2 = force x distance
What force? What distance? You can't do it by energy.
0
3 years ago
#1778
(Original post by suprisefish)
you seem to be missing a 2. 2sinÎ¸cosÎ¸ = sin2Î¸
You dont need that.... As long as you state they are constant as its a fixed angle, a lot of physics people dont do core so wouldn't know that identity
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3 years ago
#1779
(Original post by Josh771)
You dont need that.... As long as you state they are constant as its a fixed angle, a lot of physics people dont do core so wouldn't know that identity
yeah it won't be in the mark scheme. but u will need the correct equation with either 2sinÎ¸cosÎ¸ or sin2Î¸
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3 years ago
#1780
(Original post by sometimestigz)
it was massively harder than past papers- have you DONE any past papers?! I've been regularly getting 100%s on past papers I've never seen before but this exam took it out of me. Maybe you're possessed by the spirit of Newton or sommit.
Hahahaha XD I found it quite hard but most of my peers said it was decent (one guy even said he enjoyed it o_o') so I'm gonna say overall it was hard but not the hardest so far. I hope you're right though; the lower the grade boundaries the better!
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