Mathematics: Post your doubts here!

[GorgeousEyes]

Uhm, give me like 2 minutes. I'll brb.

tyt

 

[lightic]

can some one solve this question 7) iii) and iv) part for me. I have no idea what does Reaching height for 2nd time means in this question. Thankyou .
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_43.pdf

 

[Pie-man]

43 is a bit wierd thou. :/ Anyhow, what is your real variant?

i'm v.42 but didn't solve a full exam from that variant only bit of questions by people here u?

 

[AlishaK]

i'm v.42 but didn't solve a full exam from that variant only bit of questions by people here u?

v42...Solved 'em all till 2010! B| haha... Besta luck! ..bu-ut why didn't you do your own variant?

 

[Silent Hunter]

v42...Solved 'em all till 2010! B| haha... Besta luck! ..bu-ut why didn't you do your own variant?

hey is there any general difference between difficulty level of the differnt varients or they are same in this respect? :\

 

[AlishaK]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_43.pdf
Q1 part ii. It's a bit absurd but just tell me. :/ Please! :')
Pie-man guess u have done this one?!

 

[AlishaK]

hey is there any general difference between difficulty level of the differnt varients or they are same in this respect? :\

I personally think v43 is a bit stupid! with those semi circles. -__- i like my variant better. Actually i just started v43...lol..not sure.

 

[Pie-man]

v42...Solved 'em all till 2010! B| haha... Besta luck! ..bu-ut why didn't you do your own variant?

well the past paper i have is for v.41 and if i go for other variants i choose v.43 cause i like the number 3 more than 2 .... i'm a complex person

 

[AlishaK]

well the past paper i have is for v.41 and if i go for other variants i choose v.43 cause i like the number 3 more than 2 .... i'm a complex person

Hey! I like the number 2 better than 3. Or maybe I'm just making it up cause you mentioned it...haha ;P

 

[Silent Hunter]

Hows preparation people? Generally speaking what type of questions you people think are difficult ? .....

 

[Pie-man]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_43.pdf
Q1 part ii. It's a bit absurd but just tell me. :/ Please! :')
Pie-man guess u have done this one?!

i've reached the point where i have no ability to think but you have to use Energy to get it cause you have height and mass and at point A K.E. is zero....i think, but i still might be wrong ... i'll just go sleep

 

[Esme]

Hows preparation people? Generally speaking what type of questions you people think are difficult ? .....

If anything new and tricky comes up, I might have to exert more than usual thinking power lol
If questions similar to those in the past papers appear, then I'm fine I think..
How's your prep?

 

[AlishaK]

i've reached the point where i have no ability to think but you have to use Energy to get it cause you have height and mass and at point A K.E. is zero....i think, but i still might be wrong ... i'll just go sleep

okay thanks i guess?!
Best of luck for tomorrow thou.
Cheerio!

 

[Pie-man]

Hey! I like the number 2 better than 3. Or maybe I'm just making it up cause you mentioned it...haha ;P

didn't know my complexity can be transferred through the internet

 

[AlishaK]

didn't know my complexity can be transferred through the internet

it's seems pretty contagious!

 

[Esme]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w12_qp_43.pdf
Q1 part ii. It's a bit absurd but just tell me. :/ Please! :')
Pie-man guess u have done this one?!

Work done by resistance = 0.6 x 5.6 = 3.36
Loss in PE = 0.8 x 10 x 2.5 = 20
Work done by driving force =0
0 = 3.36 - 20 + gain in KE
gain in KE = 16.64
0.5 x 0.8 x v^2 =16.64
v= 6.45

 

[Pie-man]

okay thanks i guess?!
Best of luck for tomorrow thou.
Cheerio!

thanks you too....

and btw i am probably right use energy to get it

 

[AlishaK]

Work done by resistance = 0.6 x 5.6 = 3.36
Loss in PE = 0.8 x 10 x 2.5 = 20
Work done by driving force =0
0 = 3.36 - 20 + gain in KE
gain in KE = 16.64
0.5 x 0.8 x v^2 =16.64
v= 6.45

Esme, you are like one of those ppl when someone's totally screwed up nd nobody knows what to do, you appear like 'Esme to the Rescue'...lol
Thanks a lot.
Cheers!

 

[AlishaK]

thanks you too....

and btw i am probably right use energy to get it

I'm supersaturated with mechanics...! I can fix a car now at 'kahar bayie sayyarat'...haha!

 

[D0cEngi]

here is the whole idea (or how i did it) just draw a vertical line at point B to get a letter Z, and by using trigonometry get the angles so you can make a resolution, then Tension c and Tension a will be equal to each other (with the sine and cosine of course) and 8 would be equal both added together.

then get the tensions by substitution between both equations.

Thanks but I'll appreciate if u draw a diagram also.