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Mathematics: Post your doubts here!

hellodjfos;s'ff

hellodjfos;s'ff

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O bas bas, you need to be smart to do well in such subjects too!!! You don't just get 1500+ in sats just like that...
 
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Pravin Hapugaswatta

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DudeWithoutName said:
some people got the value 5.20 for mew instead of 0.577. What they did was reverse the direction of P such that now it acts down the plane. So the two simultaneous equataions become P(min)+20gsin(60)=20gcos(60)mew and P(max)=20gcos(60)mew+20gsin(60) and then P(max)=2P(min).. Did the question specify the direction of the force P or no?
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It cant be that large...if it is 5.2 it should be on something like sandpaper
 
hellodjfos;s'ff

hellodjfos;s'ff

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abbas haider said:
I got mew 5.2 I know its wrong (beacause mew is usially between 0 to 1) can anyone point out where i went wrong? Plus How much marks can i expect for this question?
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Not sure what went wrong, would have to ask my teacher about this, so if anyone has got pictures of the paper please do share them(ask your exam officer to take photos from the extra copies CIE sends, pls). You can expect to lose 1 mark for the wrong answer for sure, and possibly 2 marks for not showing one of the correct scenario. You should get around 4 marks still provided that you showed your working in full.
 
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abbas haider

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hellodjfos;s'ff said:
Not sure what went wrong, would have to ask my teacher about this, so if anyone has got pictures of the paper please do share them(ask your exam officer to take photos from the extra copies CIE sends, pls). You can expect to lose 1 mark for the wrong answer for sure, and possibly 2 marks for not showing one of the correct scenario. You should get around 4 marks still provided that you showed your working in full.
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upload_2018-5-16_21-2-50.png

Btw Check this out Friction coefficient can be as high as 21 provided you conduct the experiment in VACUM which was'nt mentioned on the paper ...BUT it did'nt specify of air Either(JK...lol)
 
angryrider_56

angryrider_56

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angryrider_56 said:
lmao i got 1100
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man i did sooooo bad in maths this year....i wish i get the chance to resit it in ON...Man stress can kill someone's confidence, like my level in pure maths was sooo good that i excpected to score a full mark (that's how well i was in pure) but then i saw the yellow paper and got shocked then i started stressing and ended up doing some random shit....mechanics it was my fault for not paying it much attention..sigh, a hard lesson learnt the hard way
 
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Mistar-Kigi

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Okay fellas! Now I know this question has already been answered but I really need opinions of more than just 1 person. My value for mew was about 5.2. How much marks am I really expected to lose here. The question was worth 7 marks just so you know.
 
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DudeWithoutName

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Mistar-Kigi said:
Okay fellas! Now I know this question has already been answered but I really need opinions of more than just 1 person. My value for mew was about 5.2. How much marks am I really expected to lose here. The question was worth 7 marks just so you know.
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no way you will lose alot of marks. I say youd gain marks for implying the rule for friction. One of the two equations you set is correct but the other is wrong so something like 4/7

(Btw you are one the few people who got 5.20 and think they are were wrong... Do you know what went wrong for you? Thanks)
 
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