Mathematics: Post your doubts here!

[haha101]

ok here is what i mean. thats how i'd solve it

OMG it was that easyy
Man M1 is getting to my head Thanks soo much Pie-man

 

[ZainH]

Youu are great mash'allah thank youuu

You're welcome x)

sinx/cosx =wg/5.5
tanx * 5.5 = wg

Substitute this in the second equation
5.5cosx + sinx( tanx * 5.5) = 7.3
after simplifying the brackets, you'll get
5.5cos^2 x + 5.5 sin^2 x = 7.3 cosx
5.5( cos^2 x + sin^2 x) =7.3 cosx
5.5/7.3 = cosx
x= 41.4

now wg= tan41.4 * 5.5

Thank you, my brain stopped e_e

 

[Pie-man]

OMG it was that easyy
Man M1 is getting to my head Thanks soo much Pie-man

you're welcome but try to complete it first cause i didn't check how it turned out though.

 

[Manobilly]

Mechanis doubt! Plz answer

 

[mominzahid]

Oh that's easy just make 2 simultaneous equations.
Use s=ut+1/2at^2

So your first equation is: 55=5u+12.5a
And second one is: 120=10u+50a

Solve them simultaneously, you should get a=0.4 and u=10 m.s-1

where did the 2nd equation come from? :/

 

[Manobilly]

43 oct 2012 q4

 

[ZainH]

where did the 2nd equation come from? :/

First equation is from A to B, second one is from B to C.
From B to C your total distance is 120, and the total time taken will be 10 seconds.

 

[mominzahid]

Oh righttt.. i was using B to C... -_-
Anyways q4(ii) same paper?

 

[roudina]

may june 2009 question 1 c)ii) my answer is different than the mark scheme and i can't get the write answe
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s09_qp_4.pdf

 

[Esme]

You're welcome x)



Thank you, my brain stopped e_e

You're welcome happens to everyone at some point I guess

 

[Esme]

may june 2009 question 1 c)ii) my answer is different than the mark scheme and i can't get the write answe
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s09_qp_4.pdf

You're at the wrong thread hun. This is A levels. You should head over to IGSCE

 

[roudina]

ah ok sorry

 

[GorgeousEyes]

June011 v.43 no.4 and no.5 please ,, Honestly they are the worst questions ever

 

[ZainH]

Oh righttt.. i was using B to C... -_-
Anyways q4(ii) same paper?

Just add up your values of the forces in the y-direction , and they've already given you the ones in the x-direction.
Use Pythagoras to find resultant, and then use whatever to find the angle .

Hope you got it x)

 

[AlishaK]

Which variant is tougher, 41 or 43 ?
Lemme know ASAP! Thanks a lot.

 

[mominzahid]

Just add up your values of the forces in the y-direction , and they've already given you the ones in the x-direction.
Use Pythagoras to find resultant, and then use whatever to find the angle .

Hope you got it x)

By what time will u be here to help? im still doing papers and problems are arising.. :/
and will u also be available in the morning?

 

[ZainH]

Oh righttt.. i was using B to C... -_-
Anyways q4(ii) same paper?

Solved that earlier in the thread, it's like 4-5 pages back.

 

[Tkp]

June011 v.43 no.4 and no.5 please ,, Honestly they are the worst questions ever

for keeping the block equilbrium a frictional force must act on the block in the right direction
so 6.1+5cos theta=f
f=7.5
2)f=ur
r=12.5
3)7.5-8.6-5cos theta=ma

 

[ZainH]

By what time will u be here to help? im still doing papers and problems are arising.. :/
and will u also be available in the morning?

I'll be here till like 11, which is 3 more hours I guess.

I won't be here in the morning though.

 

[Esme]

Which variant is tougher, 41 or 43 ?
Lemme know ASAP! Thanks a lot.

everyone's version of 'tough' is different