helpplease346
Badges: 9
Rep:
?
#1
Report Thread starter 1 month ago
#1
http://prntscr.com/16c3kg7 Help please as I am confused.
Is it 8i-2j+ai+bj+ai-bj=0? Please show me the working out
0
reply
laurawatt
Badges: 21
Rep:
?
#2
Report 1 month ago
#2
(Original post by helpplease346)
http://prntscr.com/16c3kg7 Help please as I am confused.
Is it 8i-2j+ai+bj+ai-bj=0? Please show me the working out
What did you get as the values for a and b?
0
reply
username1732133
Badges: 15
Rep:
?
#3
Report 1 month ago
#3
(Original post by helpplease346)
http://prntscr.com/16c3kg7 Help please as I am confused.
Is it 8i-2j+ai+bj+ai-bj=0? Please show me the working out
Check the bit in bold above.
0
reply
helpplease346
Badges: 9
Rep:
?
#4
Report Thread starter 1 month ago
#4
(Original post by laurawatt)
What did you get as the values for a and b?
a=-8
B i dont know
0
reply
helpplease346
Badges: 9
Rep:
?
#5
Report Thread starter 1 month ago
#5
(Original post by Plücker)
Check the bit in bold above.
Becomes 8i-2j +2ai=0 (bj-bj becomes nothing)
0
reply
laurawatt
Badges: 21
Rep:
?
#6
Report 1 month ago
#6
(Original post by helpplease346)
a=-8
Not quite, you’re almost there. When you split up what you wrote in your first post into just the ‘i’ component you get 8i+ai+ai=0, so 8i+2ai=0
0
reply
laurawatt
Badges: 21
Rep:
?
#7
Report 1 month ago
#7
(Original post by helpplease346)
Becomes 8i-2j +2ai=0 (bj-bj becomes nothing)
Plücker is wanting you to look at the F3 in the question, then look at what you’ve written for F3
1
reply
helpplease346
Badges: 9
Rep:
?
#8
Report Thread starter 1 month ago
#8
(Original post by laurawatt)
Not quite, you’re almost there. When you split up what you wrote in your first post into just the ‘i’ component you get 8i+ai+ai=0, so 8i+2ai=0
oh a=-4
Then for b idk
0
reply
laurawatt
Badges: 21
Rep:
?
#9
Report 1 month ago
#9
(Original post by helpplease346)
oh a=-4
Then for b idk
Yeah that’s good
So to find b we do the same thing as we did to find a, but we focus on the ‘j’ component instead , give it a try and post what you get?
0
reply
helpplease346
Badges: 9
Rep:
?
#10
Report Thread starter 1 month ago
#10
(Original post by laurawatt)
Yeah that’s good
So to find b we do the same thing as we did to find a, but we focus on the ‘j’ component instead , give it a try and post what you get?
b=3 ?
0
reply
laurawatt
Badges: 21
Rep:
?
#11
Report 1 month ago
#11
(Original post by helpplease346)
b=3 ?
Yep
0
reply
helpplease346
Badges: 9
Rep:
?
#12
Report Thread starter 1 month ago
#12
(Original post by laurawatt)
Yep
Thank you.
Part B)will be
-8i+2j (F1 is reversed) -4i+3j +-4i-j
= -16i +4j is the answer for part B?
0
reply
helpplease346
Badges: 9
Rep:
?
#13
Report Thread starter 1 month ago
#13
(Original post by laurawatt)
Yep
is part b -16i+4j ? Thank you for the help
0
reply
laurawatt
Badges: 21
Rep:
?
#14
Report 1 month ago
#14
(Original post by helpplease346)
is part b -16i+4j ? Thank you for the help
Yep think so
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How would you feel if uni students needed to be double vaccinated to start in Autumn?

I'd feel reassured about my own health (30)
16.04%
I'd feel reassured my learning may be less disrupted by isolations/lockdowns (59)
31.55%
I'd feel less anxious about being around large groups (21)
11.23%
I don't mind if others are vaccinated or not (16)
8.56%
I'm concerned it may disadvantage some students (10)
5.35%
I think it's an unfair expectation (48)
25.67%
Something else (tell us in the thread) (3)
1.6%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise