A2 Mechanics (maths p5)

[raihan1904]

ok differnt person have differrent thoughts!!! btw i dropped stats bcos i find it boring n it wont benefit in my engineerin course in university

 

[Zishi]

lol why do u wanna complicate ur life by takin these many math modules??

Well, I love everything related to Mathematics. My life won't be complicated - I'll seriously enjoy my life because of my enthusiasm in Maths.

 

[raihan1904]

Well, I love everything related to Mathematics. My life won't be complicated - I'll seriously enjoy my life because of my enthusiasm in Maths.

well i love maths too!!! that doesnt mean we have to do evrything related to maths!! like i wanted to do Further mathematics this year but couldnt find a tutor!! n Further mathematics is wayy farr advance compared to our maths

 

[ibadsiddiqi]

Enjoy m2 everyone! Hope you have an amaazing paper

 

[earthling]

can you show working and upload if you don't mind?

I don't mind. But if I could, I would. Apparently, I cant upload a file over here from the iPad.

 

[angelicsuccubus]

sigh ... A2 mech is like Q%^$%*&^ as much as I love it

 

[angelicsuccubus]

I don't understand how the mgh, k.e and EE work in q7 (i)
http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s10_ms_53.pdf

 

[mybch]

oh ok
thanks anyways

 

[tasnim007]

I don't understand how the mgh, k.e and EE work in q7 (i)
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s10_ms_53.pdf

Total energy at O = K.E.=0.5(0.4)(2^2)=0.8 J

Total energy at extension x:
E.P.E.(elastic potential energy)=0.5(24/3)(x^2)=4(x^2) J
G.P.E.(gravitational potential energy)=0.4(10)(-(3+x))= -12-4x J
K.E.=0.5(0.4)(v^2)=0.2(v^2) J

TOTAL ENERGY: 4(x^2) + (-12-4x) + 0.2(v^2).

Conservation of energy: total energy constant.

Therefore 4(x^2) + (-12-4x) + 0.2(v^2) = 0.8.

simplify, you will get answer.

 

[TaimoorK]

Can u explain centre of mass i dont understand anything about it!!!

 

[TaimoorK]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_51.pdf
Q.2 can u explain how to do it :/

 

[angelicsuccubus]

Total energy at O = K.E.=0.5(0.4)(2^2)=0.8 J

Total energy at extension x:
E.P.E.(elastic potential energy)=0.5(24/3)(x^2)=4(x^2) J
G.P.E.(gravitational potential energy)=0.4(10)(-(3+x))= -12-4x J
K.E.=0.5(0.4)(v^2)=0.2(v^2) J

TOTAL ENERGY: 4(x^2) + (-12-4x) + 0.2(v^2).

Conservation of energy: total energy constant.

Therefore 4(x^2) + (-12-4x) + 0.2(v^2) = 0.8.

simplify, you will get answer.

thanks

 

[angelicsuccubus]

Can u explain centre of mass i dont understand anything about it!!!

http://www.examsolutions.co.uk/maths-revision/syllabuses/AQA/period-1/M2/module.php watch these centre of mass vids..

 

[angelicsuccubus]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_51.pdf
Q.2 can u explain how to do it :/

basically its the area of semicircle x centre of mass from O = area of triangle x its centre of mass from O.
They are taking each lamina's centre of masses seperately because the centre of mass of the entire shape is at O.