The Student Room Group

C4 vectors question

I can do question 4 part b, but don't get where to place the vectors. Where would you plot the points a and b?
Reply 1
v (2).png
Well, can you relate a to a vector joining 2 points on the parallelogram (possibly with a scale factor)? How about b? So where should they go on a copy of the diagram?
Reply 3
Original post by DFranklin
Well, can you relate a to a vector joining 2 points on the parallelogram (possibly with a scale factor)? How about b? So where should they go on a copy of the diagram?


Wouldn't the position b be half way from T to S ?
Original post by gooner1010
Wouldn't the position b be half way from T to S ?
I don't think so - what did you get for OS and TR?
Reply 5
Original post by DFranklin
I don't think so - what did you get for OS and TR?


OA = 1/2 OS , OB = 1/4 TR

Wouldn't that mean its half way? between T and S
Original post by gooner1010
OA = 1/2 OS , OB = 1/4 TR

Wouldn't that mean its half way? between T and S
No. OB is in the same direction as TR but a quarter of its length. I don't know where you've got "half way between T and S from"... :confused:
Reply 7
Original post by DFranklin
No. OB is in the same direction as TR but a quarter of its length. I don't know where you've got "half way between T and S from"... :confused:


Ahh, I've got it now. I wasn't taking into account the direction of the points.
Thanks for the help. :smile:

Quick Reply

Latest