I'm not sure how you guys found out the tension, but tension depends on weights present on the bar.
With 3 unknown variables for part b), even if you eliminate one variable by measuring moments around it, it's basically going to be impossible to find the other two simultaneously. Because the Tc you worked out in the part before doesn't apply at all to the new model given in the second part

Reply 86

dead_siaf

did anyone get 13.4 m s^-2 as the acceleration of the vector with a bearing 243?

Reply 87

Bakshjsbejnsb

I got two people in the lift 😕

Reply 88

Jodie1604

1) 1/4 u and 5/4 u
2) 6.66
3) can't remember but it was hard
4) I got 24 for U and 0.105 for t
5) lift one 708N (I think) and 7 occupants (got 7.76 and rounded down)
6) a is 6 root 5
7) inextensible,acceleration is 1.176, for part c you find the distance travelled by Q which is h plus 3h/25 ( found using suvat for Q v of P as u of Q and using -9.8 for a)

Reply 89

frankabagnale

Original post by AlkynesOfTruble

it was a god send of a paper, loved it!!! Praise the Lord

Despite freedom of speech etc.. no-one really likes to hear other people smashed the paper and found it really easy..

Well done though.

Reply 90

Fall J

Original post by Wester123

7 people in lift i got

Na it was 6 cos it said tension couldn't exceed 10 000N and the answer was 6.98 or something so you had to round down. You probably got all the marks apart from the last one though

Reply 91

applesandpeas

Original post by officialjulie1

again, I got 9 people and not tryna be cocky but I’m 100% right I triple checked so you’ve just bagged urself 7 marks bud

you forgot to include the weight in the F part of F=ma

Reply 92

gicoz

How many marks would I get if resolved forces up the plane for question 2 instead of down out of 10

Reply 93

billyjane10

Original post by officialjulie1

again, I got 9 people and not tryna be cocky but I’m 100% right I triple checked so you’ve just bagged urself 7 marks bud

you haven’t taken into account the weight of the lift. Should be -250g as well

Reply 94

Kate.W1305

I got 2 people in the lift but ivealways been so **** at them

Reply 95

noted

Original post by Kushal_09

Don't you have to count the weight of the lift while resolving?

That’s what I did and I got 2 people...

Reply 96

AlkynesOfTruble

Original post by frankabagnale

Despite freedom of speech etc.. no-one really likes to hear other people smashed the paper and found it really easy..

Well done though.

Ffs I don't like to hear people say they failed the people because come on, that was piss easy in comparison to last years paper which I only scored 85UMS in :frown:

Thanks, how'd you find it?

Reply 97

palpos

Original post by officialjulie1

If you didn’t get 5.42 you must’ve ****ed up with sin or cos somewhere, maybe done them the wrong way around, I do these questions in my sleep and it was defo 5.42

I got 5.42 then did it again and got 6.66. My mistake the first time was
to use psin(20) and pcos(20), whereas it should have been psin(50) pcos(50).

:smile: