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Edexcel AS/A2 Mathematics M2 - 17th June 2016 - Official Thread

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anyone knows how to do part c?

Differentiate the equation in part a - this will give you the gradient of the velocity at a point x. You're told it travels perpendicularly to the initial velocity so work out the gradient of the velocity at t=0. Then you just equate the two gradients together remembering that one is the normal to the other so set one of the gradients equal to the negative reciprocal of the other. Simplify and you got the answer. Hope that helps :smile:

Reply 161

alvosm

Original post by target21859

thank you so much!!! it helps a lot indeed :tongue:

good luck for tomorrow!!

Reply 162

Maetras

Original post by alvosm

thank you so much!!! it helps a lot indeed :tongue:

good luck for tomorrow!!

No problem :smile:

Good luck to you too.

Reply 163

thatapanydude

do you need to put units down such ms^-2 or Nms to get the final accuracy mark?? (I always forget these)

Reply 164

mjcejnc32

In the statics questions if you do your own method and only half of it is on the markscheme but you get everything right do you still get full marks (cuz theres probably loads of methods to do it and they obviously cant list them all)

Reply 165

fpmaniac

Can anyone explain to me jan 14 IAL question 5 pls

Reply 166

milogillot

can someone explain part b) (June 2015)

Reply 167

mjcejnc32

Original post by milogillot

can someone explain part b) (June 2015)

i was stuck on it for ages, have a look at the model answers, you just have to draw a clear diagram, use geometry, then take moments

Reply 168

milogillot

Original post by rm761

i was stuck on it for ages, have a look at the model answers, you just have to draw a clear diagram, use geometry, then take moments

ahhh yes it makes sense now, i thought about trying to find that diagonal distance but never went through with it.. cheers tho

Reply 169

fpmaniac

How to do june 2015 question 6c

Reply 170

username1424648

How should I deal with g and significant figures? I've only encountered one question so far that penalised for giving answers reached using g = 9.8 to more that 2 sf... I think it was a 2012 paper. The problem is that lots of questions since have allowed answers that use g = 9.8 to be given to 3 sf.

Reply 171

xx_lofsuburbia

Original post by notrodash

I'm not 100% sure, but on the front of this year's M1 paper, it said to give answers to 2 or 3 sf.
I'm guessing it will be the same for M2...
However, if in doubt, I usually give my answers to 2 sf.

Reply 172

Themathgeek

Hardest m2 paper?

Last one before the exam? Anyone?

Reply 173

khaleesi98

Good luck everyone ☺️

Original post by Themathgeek

Hardest m2 paper?

Last one before the exam? Anyone?

Jan 2010 has really low grade boundaries, so I think that's what I'm gonna do tomorrow morning x

Reply 174

somevirtualguy

Are there any proofs that we could be asked to show?

Reply 175

mobjwez

Hi guys, could someone please explain to me when to use a negative value for 's' and when to use a positive value in the equation 's=ut+1/2at^2'.

Reply 176

oinkk

Original post by somevirtualguy

Are there any proofs that we could be asked to show?

Nope. No formulae/concepts are proved until M3.

Reply 177

Craig1998

Good luck to all today.

Reply 178

Datta10

Is the work energy principle final energy = initial energy +or- wprk done againt friction? And if so then do you plus when energy increases amd minus when decreases?

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