2016 Unofficial M1 Mark Scheme? 2016

Ok so the length of each line doesn't matter in proportion to each other? Thanks anyway for answering my questions and the unofficial mark scheme. Think I dropped 5-6 marks in total so fingers crossed, 90 ums.

For question 2) (b)

I wrote the reaction force is equal to 15.45N.
Buth then i wrote the force exerted on the steel pan is 15.45 - 1.5g, so i took away the weight of the brick, and got 0.75N.

Will i stil get full marks because i wrote dwon that R=15.45N, though this was not my final answer?

For question 8 (last question) something went wrong with my rearranging and got T as 7 something, I represented things right and used the right equations, something went wrong when rearranging etc. I did the correct working out for the second part of it, like splitting it into two 45 degree angles etc and all of that but used my incorrect value for T from the first question, how many total marks out of the 12 do you think I can get if I only got the values for Tension wrong due to some error rearranging and the force on pulley wrong as I continued with the incorrect value?

For the qs where we had to sketch the graph... I sketched in a way that T seemed larger than 25 so how many marks would I lose ?

1) for the last question i did a stupid error and mis read the mass of the particle on the horizontal plane as 3
so in my simlatenous equations i had 3a on both of the equations
my method and everything was fine it was just that i copied the wrong mass down
this question was 8 for the (a) part
now this followeed through into the 8b part as i used teh same value but again my formula adn method were fine even the direction
hwo much would i get for this out of 12 in total?

1( for the 10 mark co efficent of fricition one i took friction in teh wrong direction and again wroking and everything was right and i did get the right answer but because i took it in the opposite way i got -0.73
out of 10 how much would i get for this question? i really hope they dont cut too much for this silly error?

I am absolutely so dissapointed that i made such silly errors but ill save you my sorrow. Do try adn get back to me thanks

So guys for the graph Q it was out of 12. If I drew the correct graph, found that the total time of motion was 40s

But my last calculation of T was wrong, how many marks do you think I would get?

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Thank you for these answers! 😃😃

I was just wondering, the quesrion where you had to find T (when train M overtakes train N) i rather stupidly wrote it to 2 sigfigs. So i did the calulation, then wrote t=8.75....t=8.8s

Would i still get all the marks?

For the scale pan q, is this an ok method? Does it matter that I called it F instead of R (who knows why I did that lmao)?

F=ma on scale pan (ignoring mass & weight of brick)

20.6-0.5g-F=0.5x0.5
15.7-F=0.25
F=15.7-0.25 =15.45 -> 15.5 (3sf)

This might be dumb, but I read on a previous mark scheme that for the first method mark u needed to show "at least 1 1/2" when working out the area under the speed time graph. I just wrote down a simplified version so instead of 0.5 X 30 X 30, I wrote 15 X 30. The rest of my method was fine and I got the write answer. The examiner will be fine with this right I hope ?!!

yes