The Student Room Group

Scroll to see replies

Original post by Princepieman
You integrate with respect to x

Posted from TSR Mobile

Original post by Red Fox
r and h aren't variables, they're just the coordinates so they are constants in this case. You only need to integrate with respect to x.


Thank you! So is this right? :smile:

Posted from TSR Mobile
Original post by Princepieman
You integrate with respect to x

Posted from TSR Mobile


Original post by Red Fox
r and h aren't variables, they're just the coordinates so they are constants in this case. You only need to integrate with respect to x.


Oops I mean this


Posted from TSR Mobile
Original post by strawberrysnow
Oops I mean this


Posted from TSR Mobile


Yeah, now sub in the limits and tidy it up.

Posted from TSR Mobile
Original post by Princepieman
Yeah, now sub in the limits and tidy it up.

Posted from TSR Mobile


Thank you so much! I got the right answer :smile:
Original post by binarythoughts
Always thought that was a really weird british saying


So did I, until I started saying it. :smile:

Posted from TSR Mobile
Guess who's sorted out their accommodation????!??!
Gah, it's actually happening, how terrifying
Original post by blamethenargles
Guess who's sorted out their accommodation????!??!
Gah, it's actually happening, how terrifying


Not fair!! I'm still waiting. Which one did you go for?

Posted from TSR Mobile
Original post by Princepieman
Not fair!! I'm still waiting. Which one did you go for?

Posted from TSR Mobile


I got my first choice- an ensuite in Raleigh Park, my Mum just has to sign some forms now as my Guarantor and then it's all sorted!
(C4 integration)
I'm so sorry for being so annoying but I'm stuck again... :frown:

This is the question and this is what I did but I got the wrong answer...

Also how do you sketch the curve? I basically just guessed...

Any help would be greatly appreciated! Thank you :smile:

Posted from TSR Mobile
(edited 9 years ago)
Original post by strawberrysnow
(C4 integration)
I'm so sorry for being so annoying but I'm stuck again... :frown:

This is the question and this is what I did but I got the wrong answer...

Also how do you sketch the curve? I basically just guessed...

Any help would be greatly appreciated! Thank you :smile:

Posted from TSR Mobile


You haven't differentiated to find the stationary points or where the graph is increasing or decreasing.



Posted from TSR Mobile
Original post by Princepieman
You haven't differentiated to find the stationary points or where the graph is increasing or decreasing.



Posted from TSR Mobile


Thank you! I differentiated it to find the stationary points however, I only got root 2?? But when I inputted 1 and 2, I got the gradient as being 0? I'm quite confused on that part.

However, I got the actual volume right when I inputted x=2 into the bit that I integrated :smile:
Original post by emcat
I'm waiting on St Andrews and Edinburgh. Already heard from Glasgow but I haven't been there yet so idk what the uni is like.


Glasgow is beautiful! The city is brilliant too. Was one of my faves. Had such a more friendly feel about it than Edinburgh imo (this was maths /physics department tho)

Posted from TSR Mobile
ugh - Moments in M2 are killing me slowly, :bawling:
Original post by _Caz_
ugh - Moments in M2 are killing me slowly, :bawling:

Which exam board are you? :redface:
Original post by _Caz_
ugh - Moments in M2 are killing me slowly, :bawling:

I feel you
Original post by cerlohee
Which exam board are you? :redface:


Mei >_> what about you?
Original post by _Caz_
ugh - Moments in M2 are killing me slowly, :bawling:


Be glad you're not doing them in M3 :frown:

I personally found projectiles hard last year, probably because we rushed to learn them before the exam :frown: They're the reason I need to resit the exam this year :angry:
Original post by Tibbz2
Be glad you're not doing them in M3 :frown:

I personally found projectiles hard last year, probably because we rushed to learn them before the exam :frown: They're the reason I need to resit the exam this year :angry:


what exam board are you? Our M3 is simple harmonic and circular motion type stuff...

projectiles *shudder* I just made suvat lists and hoped that would get me through it
Original post by _Caz_
what exam board are you? Our M3 is simple harmonic and circular motion type stuff...

projectiles *shudder* I just made suvat lists and hoped that would get me through it


OCR, we have SHM and circular motion, and they have decided to mash circular motion and free projectile motion into the same questions, it's horrible :frown:

We also do rigid bodies and hinges and elastic string problems, which are probably the easier questions :tongue:
Original post by Tibbz2
OCR, we have SHM and circular motion, and they have decided to mash circular motion and free projectile motion into the same questions, it's horrible :frown:

We also do rigid bodies and hinges and elastic string problems, which are probably the easier questions :tongue:


Our M1 is projectiles, resolving forces on a plane, general suvat
M2 is moments, centre of mass, energy work and power
m3(which I'm not doing) is circular motion SHM etc...

The discrepancy between exam boards in content is ridiculous. We barely touch differential equations in maths and further maths and some exam boards get to do second order ones! So strange.

Latest