Physics: Post your doubts here!

[Zaki ali asghar]

for Q1 last part is equating G.P.E to K.E and then finding v and then saying since it's lesser than the given velocity, it will escape. is this enough for 4 marks?

 

[anastasia grey113]

Yes thats correct the exact same one came in 17 not sure M/J or O/N

lol idr doing it but lol ok thank goodness

 

[anastasia grey113]

for Q1 last part is equating G.P.E to K.E and then finding v and then saying since it's lesser than the given velocity, it will escape. is this enough for 4 marks?

yh it should be
one mark must be for writing change in gpe = change in ke
and then for proving it to be 2.4 and writing wut u wrote = 3 marks
if u wrote the formula yes u got all 4

 

[Tauqir_hamed]

Yes thats correct the exact same one came in 17 not sure M/J or O/N

I wrote this :
THE LINES ARE RADIAL AND PERPENDICULAR TO THE SURFACE OF THE EARTH
g= GM/ ( R + h ) ^ 2..
h is extremely small compared to the Radius of the Earth
So, g is approximately constant

 

[anastasia grey113]

I wrote this :
THE LINES ARE RADIAL AND PERPENDICULAR TO THE SURFACE OF THE EARTH
g= GM/ ( R + h ) ^ 2..
h is extremely small compared to the Radius of the Earth
So, g is approximately constant

yh i missed the first point but wrote the rest

 

[Zaki ali asghar]

i think even after such intense discussion, our marks haven't dropped below 80 so it's all good i guess.

 

[haithsoul]

I wrote this :
THE LINES ARE RADIAL AND PERPENDICULAR TO THE SURFACE OF THE EARTH
g= GM/ ( R + h ) ^ 2..
h is extremely small compared to the Radius of the Earth
So, g is approximately constant

line are PARALLEL near survace

 

[Tauqir_hamed]

yh it should be
one mark must be for writing change in gpe = change in ke
and then for proving it to be 2.4 and writing wut u wrote = 3 marks
if u wrote the formula yes u got all 4

Was the question of 4 marks ??

 

[anastasia grey113]

i think even after such intense discussion, our marks haven't dropped below 80 so it's all good i guess.

yh true xDD
i hope thaz the most v lose
nothing more than that

 

[anastasia grey113]

line are PARALLEL near survace

yh i wrote this

 

[Tauqir_hamed]

line are PARALLEL near survace

well they are perpendicular to the surface

 

[anastasia grey113]

Was the question of 4 marks ??

yh

 

[haithsoul]

man i hope i get high 80s thank god bio was easy

 

[anastasia grey113]

well they are perpendicular to the surface

yes but that is the case for all spherical objects
doesnt qualify for explaining large radius

 

[Zaki ali asghar]

changes in height much less than radius of Earth

M1 A1

so (radial) field lines are almost parallel

or

g=GM/R2 ≈GM/(R+h)2
this is what's worth for 2 marks in mark scheme

 

[anastasia grey113]

man i hope i get high 80s thank god bio was easy

lol yh same

 

[anastasia grey113]

changes in height much less than radius of Earth

M1 A1

so (radial) field lines are almost parallel

or

g=GM/R2 ≈GM/(R+h)2
this is what's worth for 2 marks in mark scheme

well so m defo getting 2
dk abt the 3rd mark tho

 

[Tauqir_hamed]

will I get an A* if I get the following scores:
(31/40 ), (52/60 ) , ( 25/ 30 ) , ( 84/ 100 ) , ( 23/30 )
or will paper 4's high threshold be an issue :/. if it turns out to be higher than 60 ..

 

[fatima_jawed]

y'all
i'm a P2 student and i'm flipping out looking at all you P4 kids
Is there anyone who got their hands on the Feb March 2018 series papers?

 

[Zaki ali asghar]

yh, that's an easy A*