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AQA PHYA4 ~ 11th June 2014 ~ A2 Physics

I didn't like it at all to be honest, hated that section A with a passion. The section B was fairly standard with a nice 6 marker but I couldn't find that electrostatic force on the -3e ion for the life of me!

i believe you had to find the velocity given the KE and then rearrange to find the time it took to cover the distance, calcualte the acceleration and sub into F=ma thats what i did.

Reply 41

Bow Tie

14

Good, can we assume the exam was fatal then? That makes me feel better.

Reply 42

HannahCRJ

Original post by The_Top_Hat

I didn't like it at all to be honest, hated that section A with a passion. The section B was fairly standard with a nice 6 marker but I couldn't find that electrostatic force on the -3e ion for the life of me!

I actually found section B quite difficult :frown:

I couldn't get that either! I was so irritated trying to find out how to do it! I calculated answers but almost definitely wrong ones :/

Reply 43

Bow Tie

14

Original post by Geesus2512

i believe you had to find the velocity given the KE and then rearrange to find the time it took to cover the distance, calcualte the acceleration and sub into F=ma thats what i did.

Not for [2 marks] you don't. But good work around none the less.

Reply 44

Geesus2512

what values did people get for their electric field strength? (for the 3e-)

Reply 45

Bow Tie

14

Original post by HannahCRJ

I actually found section B quite difficult :frown:

I couldn't get that either! I was so irritated trying to find out how to do it! I calculated answers but almost definitely wrong ones :/

Meh, normally I'm ok on section A and section B has always been fine but that section A was horrific for me. Maybe minimum 15? But the section B should be a bit better I suppose, maybe 40/50? Something like that I hope. At least an A would be good... :frown:

Reply 46

KingSolomon

What did people get for the force of attraction between the earth and satellite?? 2500N?

Reply 47

lbsf1

2

Original post by JamesJC

Don't know why you guys found it hard, I. Reckon grade boundaries will be something like:

74-A*
72-A
67-B
64-C

Posted from TSR Mobile

Maybe divide those by 10.

Judging by the body language of the 200 people coming out of my exam doing it I can conclude that everyone found impossible.

All my mates I have spoken too found it really hard aswell, a couple of them who were aiming for A's missed out whole massive sections.

Reply 48

Physicsrules23

Original post by Geesus2512

i believe you had to find the velocity given the KE and then rearrange to find the time it took to cover the distance, calcualte the acceleration and sub into F=ma thats what i did.

You had to use the equation work done= force * distance. But your method seems good as well. Usually there are like 3 different methods

Reply 49

Geesus2512

should have been 3sf i believe so 2450N i think

Original post by KingSolomon

What did people get for the force of attraction between the earth and satellite?? 2500N?

Reply 50

abdcefghi

Original post by Geesus2512

what values did people get for their electric field strength? (for the 3e-)

something round 15000? After this exam bye bye firm uni :frown:

Reply 51

Geesus2512

I need an A* to study physics at uni and there is not a chance in hell thats happening. I had plenty of time left over when doing past papers and i barely finished this.

Reply 52

abdcefghi

Original post by Geesus2512

should have been 3sf i believe so 2450N i think

Yeah that's definately correct as it worked in the proof later and needed 3sf

Reply 53

HannahCRJ

Original post by JamesJC

Don't know why you guys found it hard, I. Reckon grade boundaries will be something like:

74-A*
72-A
67-B
64-C

Posted from TSR Mobile

If those are even near to correct them I am in trouble!

Reply 54

Geesus2512

Original post by abdcefghi

something round 15000? After this exam bye bye firm uni :frown:

yeah i feel the same! erm i think i got 14145 so yeah.. just had to do F/Q=E so even if the force was calculated wrong (which it probably has because it was a hard question for 2 marks) follow through marks should be awarded

Reply 55

KingSolomon

Original post by abdcefghi

Yeah that's definately correct as it worked in the proof later and needed 3sf

Yeah okay I put it as 2450 too. That's good to hear

Reply 56

Geesus2512

bloody hell! how could i have forgot that?!

Original post by Physicsrules23

You had to use the equation work done= force * distance. But your method seems good as well. Usually there are like 3 different methods

Reply 57

Physicsrules23

Original post by Geesus2512

bloody hell! how could i have forgot that?!

Don't worry your method seems pretty legit too, though it may have meant you spent more time than needed

Reply 58

HannahCRJ

Original post by Geesus2512

bloody hell! how could i have forgot that?!

I can't believe I forgot that too :frown:

Reply 59

Monotypical

Good god that was awful. I found section B to be much harder than section A but maybe that's me.
At any rate, I think I'm going to have to really pull something special out for unit 5 after that :frown:

AQA PHYA4 ~ 11th June 2014 ~ A2 Physics

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