Mechanics 42

[confused123]

tnx god So overall I lost only 9 marks which ws frm last question

now forget it. move on.

 

[Majed Kaaki]

I MESSED UP !!
I JUSTTT HATEE THE EXAMM ! LIKE SHITT !
every single question is complicated !
i was very prepared ! and then booooovvvv !

 

[Majed Kaaki]

same

my thoughts exactly

same here :|

 

[midhat_moon]

you won't lose many marks cause everything else was right . Error carried forward

no wait? mechanics has error carried forward? how come cz p1 doesnt and i never saw it in the marking schemes either

 

[midhat_moon]

One of the most difficult Mechanics paper in recent years. Doubt the threshold will be more than 32 or 33.

inshaAllah, i hope what u say comes true, the world depends on this , well the a-level world atleast

 

[Saad Sarfraz]

tnx god So overall I lost only 9 marks which ws frm last question

SOrry bro's but i know its 5

 

[littlecloud11]

Yar Tension was 9N if i m nt wrong? :/

the tension was 9N.

 

[littlecloud11]

Im a 1thousand percent positive its 5. I think u made some sort of error caz my friend also got 9..

The tension was most definitely 9. sorry.

 

[Sidma khan]

One of the most difficult Mechanics paper in recent years. Doubt the threshold will be more than 32 or 33.

I hope u r ryt!!! Because i am a really good student at maths but this paper was a total mess!!

 

[littlecloud11]

okay, I think Mechanics paper 42 was easy.
A good number of people in my hall found it easy like me.

I don't think it was as tough as Winter 2011 as ImaamMalik said.

However, I made one silly mistake.

in no. 6 i,

it is Fs = 800X400 + 1250X0.125X10x400.
= 945 000.

I forgot to multiply the mass by 10 ! .

will they cut the hwole 3 marks for that question or only one accuracy mark ?

DAMN I thought I could get a 100 in this paper .

No, you'll probably get 1 mark for the right method

 

[vishal]

guys, i totally messed up with Q 7........ But i applied few formulas and found initial kinetic energy.......I found values of v bt they are wrong.....I also drew the axes for graphs........How many marks wud i get out of 13??? plzzz tell me.....I think i have got all other questions right except this.....will i get an A? Can i make it 40 out of 50?

 

[vishal]

plzzz i want replies from many people......Iam hell worried!!!!!!!!!!

 

[littlecloud11]

guys, i totally messed up with Q 7........ But i applied few formulas and found initial kinetic energy.......I found values of v bt they are wrong.....I also drew the axes for graphs........How many marks wud i get out of 13??? plzzz tell me.....I think i have got all other questions right except this.....will i get an A? Can i make it 40 out of 50?

did you use ne of the kinematics formulas while finding speed? if you did then you'll probably get around 3 method marks. and also ecf if you used the wrong value of the first speed to find the second. But i dnt think u'll get mrks for plotting the axis as it was just a sketch graph.
so, granted you applied the CORRECT methods you might just get around 5 out of 13.

 

[vishal]

i didnot have any clue of what i was doing......ya bt i used v=u+at and v2=u2+2as...........can i get an A?

 

[vishal]

can i make it 40 out of 50?? if i get all others correct?? wud i get atleast 3 marks for just using kinematics equations?

 

[donorsolutions]

before 1.4 after 1

After leaving Y it was -1. We had to state the values of v. Where v was the velocity in the direction of XY, So when it travels YX the velocity was to be quoted with negative sign. So -1 m/s

 

[donorsolutions]

Are u sure^^ ??? like did u draw an inverted grapgh curved???

we had to draw displacement time graph in the last part, and because it was constant deceleration. The displacement time graph is a curve form retardation. (ALWAYS)

 

[donorsolutions]

Oh fudje i did -_- so your velocity at the top of the hill was?

At the top of the hill velocity was 10m/s

 

[donorsolutions]

Im a 1thousand percent positive its 5. I think u made some sort of error caz my friend also got 9..

Tension was 9 N. and thats confirmed. in Question 2

 

[littlecloud11]

can i make it 40 out of 50?? if i get all others correct?? wud i get atleast 3 marks for just using kinematics equations?

if you gave an immaculate paper otherwise, yes, you'll get above 40. That's well above A.