# (FM1) Further mechanics 1 2019Watch

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Thread starter 1 week ago
#1
Anyone wanna discuss the paper?
I think it went quite well except for the last question on inequalities on the collision, I couldn't work that one out and got k<-1 lol

What did you guys think?
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1 week ago
#2
That paper was b o l l o c k s
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1 week ago
#3
The paper went ok in general but got stuck on question 4 😥
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1 week ago
#4
Idk what to think about it. I answered all the questions but idk if I did them right.
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Thread starter 1 week ago
#5
The first show that question got me confused af, It was 4 marks for 1 line of working and I was like surely that can't be it lol
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1 week ago
#6
Sameee so i tried to show all the steps but I still don't get how it was 4 marks
(Original post by SadToyCats)
The first show that question got me confused af, It was 4 marks for 1 line of working and I was like surely that can't be it lol
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1 week ago
#7
was very good tbf, couldn't do that one marker in the end that was just weird so just left it :P
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1 week ago
#8
Mechanics :

Q1: easy prove its 400KW
You should get speed V is 10 and another solution was -65 or something but V>0 .

Q2: slope ...... use work energy resolve the 8m etc... get speed 9.3

Q3: you should use impulse momentum restitution and get e= 7/18 or something

Q4: you should get speed of Q after collision 1 is u(1-ke)/k 1 or something ... that had to be negative to collide so 1-ke<0 k>1/e.... forgot expression for part b

these are the answers I got. can anyone tell me if I got any of them wrong
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Last edited by ChronoSloth; 1 week ago
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1 week ago
#9
same 7/18 for e
(Original post by ChronoSloth)
Mechanics :

Q1: easy prove its 400KW
You should get speed V is 10 and another solution was -65 or something but V>0 .

Q2: slope ...... use work energy resolve the 8m etc... go speed should be 9.3

Q3: you should use impulse momentum restitution and get e= 8/17 or something

Q4: you should get speed of Q after collision 1 is u(1-ke)/k+1 or something ... that had to be negative to collide so 1-ke<0 k>1/e.... forgot expression for part b

these are the answers I got. can anyone tell me if I got any of them wrong
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1 week ago
#10
yea I may have remembered some of the values wrong
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Last edited by ChronoSloth; 1 week ago
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1 week ago
#11
for the 1 marker about the speed after the collision I did a lot of work ... it felt like it was 3-4 marks
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0
1 week ago
#12
feel like it was something that you just had to see but do no working for, it just said write down
(Original post by ChronoSloth)
for the 1 marker about the speed after the collision I did a lot of work ... it felt like it was 3-4 marks
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Thread starter 1 week ago
#13
(Original post by ChronoSloth)
Mechanics :

Q1: easy prove its 400KW
You should get speed V is 10 and another solution was -65 or something but V>0 .

Q2: slope ...... use work energy resolve the 8m etc... get speed 9.3

Q3: you should use impulse momentum restitution and get e= 7/18 or something

Q4: you should get speed of Q after collision 1 is u(1-ke)/k 1 or something ... that had to be negative to collide so 1-ke<0 k>1/e.... forgot expression for part b

these are the answers I got. can anyone tell me if I got any of them wrong
Yeah I agree with all of them, I can't remember what I got for 3 but it sounds about right so long as you used the 3 equations coherently you should get most of the marks.

Now that you've explained q4 it all makes sense! I didn't think about it that way at all rip, my statement was V1 > V2 in order for them to collide, but I didn't consider the direction change...

By the sounds of it you probs got all right on that paper good job
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Thread starter 1 week ago
#14
Anyone here do fmechanics 2
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1 week ago
#15
marks for each q?
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1 week ago
#16
(Original post by SadToyCats)
Anyone here do fmechanics 2
yeah how did u find it
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0
1 week ago
#17
q2 was 13 and q4 was 10 for sure, the first might've been 8 then the second 9, not sure though, has to add to 40 either way
(Original post by ursbhhdb)
marks for each q?
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1 week ago
#18
(Original post by Harry_Spencer)
feel like it was something that you just had to see but do no working for, it just said write down
I probably took the long way... maybe a pattern or some sort cos they say mass of the other ball is Km so i think i apply the formula from part a using different speeds idk
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0
1 week ago
#19
really don't know mate, as i said i just left it cuz i thought time would be better spent elsewhere
(Original post by ChronoSloth)
I probably took the long way... maybe a pattern or some sort cos they say mass of the other ball is Km so i think i apply the formula from part a using different speeds idk
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1 week ago
#20
(Original post by SadToyCats)
Yeah I agree with all of them, I can't remember what I got for 3 but it sounds about right so long as you used the 3 equations coherently you should get most of the marks.

Now that you've explained q4 it all makes sense! I didn't think about it that way at all rip, my statement was V1 > V2 in order for them to collide, but I didn't consider the direction change...

By the sounds of it you probs got all right on that paper good job
Thanks for the compliment

My friend also did that same mistake for the range of k ... if you got the speed of the ball then you probably got 8/9 marks. I did do a big mistake on the fp1 paper. I said tan x =3 has no solutions and lost some solutions to some t formula question.
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