OCR MEI Mechanics 2 (Wednesday 13th May 2015)

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ICan anyone remember how many marks the last question was worth. There was the question which said show it bounces back up to 2.5m and there was another which said work out the x distance displaces. I think one was 5 and 1 was three but can't remember which way round

yeah the show that it bounces back to 2.5 was the 5 marker, the show the x distance was a 3 marker

Thanks

Well, my entire class failed this paper... We found it to be horrific, which suggests that perhaps it is our teacher's fault, partly at least.. I suppose we'll be retaking next year!.. Oh well.. Anyone else know theirs was a disaster/any words of comfort?

Reply 43

Can of tango

I used suvat for most of question 2. I won't lose marks as long as my answers are correct right?

Reply 44

gmcoote

Original post by Samuel.Winnall

My whole class found this horrific too! Hopefully everyone did so the grade boundaries will be super low haha

Reply 45

Samuel.Winnall

Haha at least we're not alone! I agree but alas I doubt they'll go into single figures 😉

Reply 46

SH0405

Original post by Can of tango

I used suvat for most of question 2. I won't lose marks as long as my answers are correct right?

You won't lose marks. The mark scheme often have the marks outlined for energy and suvat methods.

Reply 47

mathsexam2013

does anyone remember the first 3 parts of question 2?

Reply 48

Can of tango

Original post by SH0405

You won't lose marks. The mark scheme often have the marks outlined for energy and suvat methods.

Thanks, I was just panicking that the question might've said 'using work energy methods...' and I didn't read that bit, I know they do that sometimes.

Reply 49

mauriceyap

http://mauriceyap.co.uk/m2/

I've tried to make a list of answers as best I could. Please reply with corrections!

Reply 50

Omicr

Original post by mauriceyap

http://mauriceyap.co.uk/m2/

I've tried to make a list of answers as best I could. Please reply with corrections!

I thought μ is constant

Reply 51

2015Student

Original post by mathsexam2013

by nice i mean the answer was to 1 decimal place
also do u remember any of the answers to qs4 such as the velocity of q

I think I got the Initial velocity of Q to be 5ms^-1 to the right, after working out the Final velocity of P was -4ms^-1 (4ms^-1 to the left)

Reply 52

EllieLC

I'm pretty sure I got the velocity of q to be 7 for the first part

Reply 53

mauriceyap

Original post by Omicr

I thought μ is constant

It's constant but unknown. Friction is not necessarily FMax as although the system is in equilibrium, it's not on the point of sliding.

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Reply 54

mauriceyap

Original post by jpatel1234

Does anyone remember what the masses of the two objects and the velocities which were given in the question (of 4) were please as i want to try to see if i can get the correct answers

P was going 6ms-1 to the left, Q was going 5ms-1 to the right if memory serves me right. P had mass 4kg and Q, 5kg I think, but I'm not sure.

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Reply 55

ComputerMaths97

Original post by jpatel1234

Does anyone remember what the masses of the two objects and the velocities which were given in the question (of 4) were please as i want to try to see if i can get the correct answers

6ms =>
P(4kg) -----------Q(5kg)
-------------------<=3ms

That's all they gave us

Reply 56

ComputerMaths97

I'm dreaming of low grade boundaries :/ Anyone help me figure out how many marks I got based on this being what I got wrong:

everything correct up to u>=tan(theta) ----- I put u=tan(theta) (should only lose 1 but maybe 2) (was out of 3)
Got COM perimeter question entirely wrong (was out of 3 marks)
Got P=+/- 4ms but didn't know why it was -4ms (will only lose 1, maybe 2 if they're really mean)
I said block would move when it didn't (defo lost the 2 marks)
And therefore from previous part, missed out 1 force in KE equation to find distance P had travelled down slope, so got x wrong :/ (i think that was a 5 mark part correct me if I'm wrong)

To me that's a loss of 2+3+1+2+4= 12 marks lost worst case scenario
or 1+3+1+2+1 = 8 marks lost best case scenario i think!

So I got between 60-64 / 72 .... Really wanted >85 UMS :/ The dream was 90 UMS but can give up on that.

Reply 57

Ommmar

Just wanted to see how every one found the M2 exam this wednesday...
I thought it was so hard!

Reply 58

ashtonw25

Original post by Can of tango

Thanks, I was just panicking that the question might've said 'using work energy methods...' and I didn't read that bit, I know they do that sometimes.

SUVAT only works for constant acceleration though

Reply 59

Amber.cg.03

Original post by Samuel.Winnall

Mine was a complete disaster!!! I didn't finish a single question!!! Ull be fine if u can retake next year, just do all the past papers,it works for me...sadly I can't do it next year!! I need to get 100 ums in c3 and c4 to get an A now!!