Year 12s: what will be the first way you research your future options? >>

OCR (non mei) M1 Friday 17th June 2016

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Reply 20

username1878001

Original post by daniellon

Cosine rule in the formula booklet?

Yep

Reply 21

daniellon

What was the tension before P was released?

Original post by daniellon

What was the tension before P was released?

O.2g = 1.96?

Reply 24

Furthermaths100

My answers:
Distance: 10, time 1.43
a=6.8
3, 1.25
82.7
82.8
0.918, 48.6
6
3.75
4.75
12, 16.3
2.06 (east)
1.96, 1.81
3.64
1.96?
10
3, 25 (as shown)
6.76

Reply 25

metasysta

Original post by Furthermaths100

My answers:
Distance: 10, time 1.43
a=6.8
3, 1.25
82.7
82.8
0.918, 48.6
6
3.75
4.75
12, 16.3
2.06 (east)
1.96, 1.81
3.64
1.96?
10
3, 25 (as shown)
6.76

Please could you help by putting these into the community MS?

Reply 26

daniellon

Original post by Furthermaths100

My answers:
Distance: 10, time 1.43
a=6.8
3, 1.25
82.7
82.8
0.918, 48.6
6
3.75
4.75
12, 16.3
2.06 (east)
1.96, 1.81
3.64
1.96?
10
3, 25 (as shown)
6.76

I got 2.37 instead of 1.96

Reply 27

username1878001

Original post by Parallex

Ahh, fair enough. Looks like I pictured the resultant force wrongly...

Reply 28

physicskid123

Original post by Parallex

your cosine rule is wrong. it's a^2 + b^2 - c^2 not (a^2 - b^2 - c^2)

Reply 29

Parallex

Original post by physicskid123

your cosine rule is wrong. it's a^2 + b^2 - c^2 not (a^2 - b^2 - c^2)

It isn't wrong..

Reply 30

physicskid123

Original post by Parallex

It isn't wrong..

it is

Reply 31

daniellon

For question 5 I said the direction is to the right. Can I get away with it

Reply 32

Nemya_Nation

your cosine rule is wrong. it's a^2 + b^2 - c^2 not (a^2 - b^2 - c^2)

- You're a moron.

Reply 33

samh2301

any grade boundary predictions?

Reply 34

Maccacco

What are people predicting for grade boundaries?

Reply 35

physicskid123

look it's cos a = (4^2 + 4^2 - 6^2) / 2*4*4 so cos a = -.125 and so a is 97.18

Reply 36

Samson1999

Original post by Parallex

That equation isn't correct.

You did b^2 + c^2 - a^2/ -2bc but there shouldn't be a minus
It should be just 2bc
Posted from TSR Mobile

(edited 7 years ago)

Reply 37

Vanilla Poison

Original post by daniellon

For question 5 I said the direction is to the right. Can I get away with it

I did too

Reply 38

rower24242424

What was the total mark for the question with the 2 4N forces because I got that whole bit wrong

Reply 39

Jackandrew1

Just a quick question for question 4 part iii. In the unofficial mark scheme it mentioned that it had already been verified. However in the question it said that after B collides with CD that there are no more collisions after this point. This means that surely B can not have a velocity of zero as A would then collide with B. Therefore shouldn't the velocity of B be at least greater than 4ms^-1 (which was the previous speed of A).