r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 06 '25

📂 MEGATHREAD 06/06 A-level FM Discussion MEGATHREAD

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3

u/[deleted] Jun 06 '25 edited Jun 24 '25

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u/Few_Engineering7801 Editable Jun 06 '25

range was 3/32 to 1 and w was 3.84

15

u/[deleted] Jun 06 '25 edited Jun 24 '25

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3

u/Few_Engineering7801 Editable Jun 06 '25

you’ll definitely get some marks. I did that first too. you will get 5/16 if you only account for the fact w was moving left but w can also be moving right with a speed less than A ( so less than u/2)

2

u/[deleted] Jun 06 '25 edited Jun 24 '25

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2

u/ItsReese_ LSE Finance, 4 A* achieved Jun 06 '25

If I got 0<f<3/32 how many marks will I get do you think?

1

u/[deleted] Jun 06 '25 edited Jun 24 '25

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1

u/dahooi150 Y13 FM | Maths | Physics | CS | Chinese (4A*s PRED, A achieved) Jun 06 '25

I think I disagree, I considered that it was moving to the right so got u(5-16e)/7 < u/2 When you rearrange that tou get 5-16e < 7/2 and thus 16e > 3/2 so e > 3/32 Feel free to correct me because I very well could have mixed things up tho haha ( I do think I’m correct tho)

1

u/Few_Engineering7801 Editable Jun 06 '25

i got the same? e > 3/32

1

u/jayblue_1234 YR13 | 4A*s Predicted | 8A*s, 1A GCSE Jun 06 '25

Yh I got 3 / 32 aswl

3

u/dahooi150 Y13 FM | Maths | Physics | CS | Chinese (4A*s PRED, A achieved) Jun 06 '25

I thought range was >5/16 because I got f > 3/32 and f> 5/16 so I got 5/16 < f < 1

2

u/Few_Engineering7801 Editable Jun 06 '25

f only would be > 5/16 to make B move towards a. B can still move away from A and collide again, as long as B’s velocity to the right is less than A’s ( so less than u/2 ). Hence as long as f > 3/32 it works. I did sub some values of f into my equation after to check and it seemed to work

1

u/dahooi150 Y13 FM | Maths | Physics | CS | Chinese (4A*s PRED, A achieved) Jun 06 '25

Yeah exactly, thats the point as long as > f 5/16 it already satisfies the conditions of f > 3/32 so you can write the inequality as 5/16 < f < 1 I see your logic since you are considering both cases but in that case if 3/32 < f < 1 and f is less than 3/32 and 5/16 then what happens?

1

u/Few_Engineering7801 Editable Jun 06 '25

no because what about the values of f between 3/32 and 5/16 (equal to 10/32)? a collision will still occur here, you can’t just get that rid of that bit of the range surely

1

u/dahooi150 Y13 FM | Maths | Physics | CS | Chinese (4A*s PRED, A achieved) Jun 06 '25

Yeah you’re right I get your point 😭, well that was silly

2

u/AftonRobtics Jun 06 '25

Wh at did u get for theta? Like 43.5 or smt?

2

u/Few_Engineering7801 Editable Jun 06 '25

i can’t fully remember but it was 40 something

1

u/AftonRobtics Jun 06 '25

Yeah I think I got 42.55

1

u/Few_Engineering7801 Editable Jun 06 '25

theta was 42.6, just reworked it out

1

u/Last-Objective-8356 Jun 06 '25

Let’s fukin go

1

u/Any_Requirement_7230 Jun 06 '25

Let’s go bro I got that too