UNOFFICIAL MARKSCHEME!~AQA GCSE Physics Unit 2 25th Janurary NEW SPEC

but guys gravity is a force. The question asked what 'force'...

Reply 541

Original post by infamous123

but guys gravity is a force. The question asked what 'force'...

which force...

please tell me where on here it says gravity is a force: 'http://en.wikipedia.org/wiki/Gravitation'
as opposed to the force due to gravity, which in our case is weight

Reply 542

mad bro? Chill... :wink:

Reply 543

Dalek1099

21

Original post by IsaacIIV

which force...

please tell me where on here it says gravity is a force: 'http://en.wikipedia.org/wiki/Gravitation'
as opposed to the force due to gravity, which in our case is weight

They do have a point though because we refer to the force pushing inwards in a star as the gravity.

Reply 544

Original post by infamous123

mad bro? Chill... :wink:

I'm just trying to be realistic, i don't write the mark schemes, nor do I determine the laws of physics... I'm just saying that in all likelihood, the mark scheme will ask for 'weight'... what would be the point in the question if both were accepted anyway?

Reply 545

Beat

10

Original post by IsaacIIV

which force...

please tell me where on here it says gravity is a force: 'http://en.wikipedia.org/wiki/Gravitation'
as opposed to the force due to gravity, which in our case is weight

If gravity attracts us to the Earth then how come it doesn't attract oil droplets to the Earth?

Reply 546

Also for the question that asked name another factor that effects braking distance I put 'speed' is that correct?

Reply 547

Original post by Beat

If gravity attracts us to the Earth then how come it doesn't attract oil droplets to the Earth?

True...

Reply 548

the pushing force inwards on a star is CAUSED by gravity, it isn't gravity itself, but the weight of the star collapsing in on itself. I apologise if my answers earlier on stable stars was unclear on that. Who knows, maybe I lost a mark on that question for saying 'force of gravity'...?

Reply 549

08suttonb

For the calculatuion question which asked for 2 s.f would it be correct if i put 1.6 recurring? i've seen everybody say its 1.7 but technically 1.6 recurring is 2 s.f

Reply 550

think about t like this. gravity only attracts us to earth because we have a mass, without one, we would float. weight is the result of both gravity AND mass, and thus the force that acts upon us is the product of both MASS and GRAVITY, which is weight. if you still aren't convinced I recommend you speak to your physics teacher about it.

Reply 551

speed is correct, other answer could include, surface material of road, and weather conditions

Reply 552

Alex_Aits

7

Original post by infamous123

For the question about the two problems about the circuit: I put 'The voltmeter should have been across the diode not the ammeter'- Is that correct :colondollar:

?

Don't know whether the exam mark scheme will accept that - the text book just states that the voltmeter has to be connected the circuit in PARALLEL and that the ammeter has to be connected in SERIES.

Reply 553

1.6r is 2 figures, but not 2 SIG figs, sorry but your probably going to lose the mark on this one..

Reply 554

Beat

10

Original post by IsaacIIV

think about t like this. gravity only attracts us to earth because we have a mass, without one, we would float. weight is the result of both gravity AND mass, and thus the force that acts upon us is the product of both MASS and GRAVITY, which is weight. if you still aren't convinced I recommend you speak to your physics teacher about it.

The oil droplet will have a mass though? If it didn't have a mass then god knows...

Reply 555

Alex_Aits

7

Original post by IsaacIIV

think about t like this. gravity only attracts us to earth because we have a mass, without one, we would float. weight is the result of both gravity AND mass, and thus the force that acts upon us is the product of both MASS and GRAVITY, which is weight. if you still aren't convinced I recommend you speak to your physics teacher about it.

Mate, you need to chill. It's the FIRST QUESTION on the exam paper... so they are probably going to accept both weight and force... Technically gravity is a force according to the AQA specification and text books, no matter how wrong it is.

Reply 556

Original post by Alex_Aits

Mate, you need to chill. It's the FIRST QUESTION on the exam paper... so they are probably going to accept both weight and force... Technically gravity is a force according to the AQA specification and text books, no matter how wrong it is.

If the AQA Spec. says anywhere on it that gravity is a force than that's good and you'll probably get the mark.

having just looked, the only mention os it is :

1.

An object falling through a fluid will initially acceleratedue to the force of gravity. Eventually the resultantforce will be zero and the object will move at itsterminal velocity (steady speed).

which says force of gravity, not sure now? still doubt it, but at the end of the day, it's only 1 mark

(edited 11 years ago)

Reply 557

SportsFan

7

Can you please make a mark scheme because you seem confident on all the answers

Original post by IsaacIIV

1.6r is 2 figures, but not 2 SIG figs, sorry but your probably going to lose the mark on this one..

Reply 558