# Vector help

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#1
Can someone check my answers attached. Thank you!
Last edited by Hollymae764; 1 month ago
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1 month ago
#2
(Original post by hollymae764)
can someone check my answers attached. Thank you!
bc = oc-ob
So 1st one isn't correct? It would help to see what the vectors represented though.
Last edited by mqb2766; 1 month ago
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1 month ago
#3
(Original post by Hollymae764)
Can someone check my answers attached. Thank you!
(Original post by mqb2766)
bc = oc-ob
So 1st one isn't correct.
yeah I agree with this, I don't think the 1st one is correct but I think the 2nd is.
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#4
(Original post by mqb2766)
bc = oc-ob
So 1st one isn't correct? It would help to see what the vectors represented though
What is o? And would you be able to help get me started with this question because i am very confused.
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1 month ago
#5
(Original post by Hollymae764)
What is o? And would you be able to help get me started with this question because i am very confuse
O is the origin, so when you write
BC
You start at B, go back to the origin and out to C, so it's
BC = - OB + OC
Have you got a textbook for this (or notes)?
https://www.dummies.com/education/sc...tract-vectors/
Last edited by mqb2766; 1 month ago
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#6
(Original post by mqb2766)
O is the origin, so when you write
BC
You start at B, go back to the origin and out to C, so it's
BC = - OB + OC
Have you got a textbook for this (or notes)?
https://www.dummies.com/education/sc...tract-vectors/
Is this correct
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1 month ago
#7
(Original post by Hollymae764)
Is this correct
Yes, though in b) you have the element signs wrong for the same reason as above. However, these are squared so the final answer is correct.
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