Maths p42 Nov 2011 M1

[Abdulrab]

yes 100 % sure my friends were also getting this !!! oh sorry never mind i dint know !! true brother and sister right ??

 

[sagystu]

No i am sorry but i am 150% sure c is 8.72
its confirmed with my teacher.

sorry man :/

how did u do it

i did 10-sin(30) and 4cos(30) then square root with power 2

 

[Abdulrab]

10- 4sin30 = R

 

[takeurtime]

10- 4sin30 = R

yeah yeah i did the same thing and the overall answer was root 70 which is 8.36 not 8.72 :S :S

 

[takeurtime]

ohhh I HAVE MISSED UP the right CALCULATIONS !!! ... do you think how much i'll loose ??

 

[silentkiller]

integration was must to do. and by putting values of t in integration of V we get the required displacement. . . and the answer was 111m

 

[silentkiller]

ohhh I HAVE MISSED UP the right CALCULATIONS !!! ... do you think how much i'll loose ??

It was 3 mark question . . probably 2 marks

 

[sagystu]

so everall what so what do think the grade thesholds would be ? let's predict

 

[Abdulrab]

no overall answer is 8.72 N bec under root 8square + 4cos30square thaT MAkes it under root 76 and the answer will be 8.72 N check it in the calculator

 

[xEnTHuSiAsTx]

This guy's right^ and yeah! The thresholds will be around 36-37.

 

[sagystu]

hey abdelrub i did it the same way but i didn't put brackets in the calculator so i got wrong answer so how much woulld i lose

also i did the cooficiant wrong ( how much was the cooficiant marks )

 

[Abdulrab]

2 marks for the coefficent but i dont know how much ull loose !!

 

[sagystu]

thnx

 

[takeurtime]

so what should be the coiffi. ??? i think it was 0.5-- ... right ?

 

[heroism999]

yes the accn and tension are 100% right! I am not sure about C though as our mech. teacher confirmed my answer was right! Hardies :/
Was question2 the one for integrating twice. If yes, the answer was 111metres.

i too gote 111m

 

[razajavaid]

Anyone tell me in q6 part1 potential energy is also needed or not????