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[ttpp1124]

Homework Statement

I've begun this question. I'm not sure what a collinear vector is or how to show the exact magnitude. Also, if someone can confirm the top two, that'd be great!

Relevant Equations

N/A

 

[BvU]

I'm not sure what a collinear vector is or how to show the exact magnitude

A vector that lies along the same line. The idea is that a vector starts in the origin and points in a particular direction. In that context, AB and DE are collinear and so are AB and ED

Also, if someone can confirm the top two, that'd be great!

I can't. But I can confirm the top one

Magnitude is length. So AB and BA have magnitude 5 cm.

 

[ttpp1124]

A vector that lies along the same line. The idea is that a vector starts in the origin and points in a particular direction. In that context, AB and DE are collinear and so are AB and ED
I can't. But I can confirm the top one

Magnitude is length. So AB and BA have magnitude 5 cm.

So then the magnitude of BD is AE.
What could possible be the collinear vector to AD??

 

[BvU]

So then the magnitude of BD is AE

No. AE is a vector, not a magnitude (i.e. not a number, a scalar)
But the statement "The magnitude of BD is the same as the magnitude of AE" is correct. Idem AC and BF

What could possible be the collinear vector to AD

AB and DE are collinear and so are AB and ED

So you search for one or more lines parallel to AD

 

[ttpp1124]

No. AE is a vector, not a magnitude (i.e. not a number, a scalar)
But the statement "The magnitude of BD is the same as the magnitude of AE" is correct. Idem AC and BF
So you search for one or more lines parallel to AD

So then collinear to AD would either be BE or EB

 

[BvU]

BE points in a different direction than AD

 

[ttpp1124]

BE points in a different direction than AD

It has to be in the same direction. I will use EB

 

[BvU]

Clearly, EB also points in a different direction than AB
If EB would be collinear, so would BE !

So you search for one or more lines parallel to AD

Don't you see any lines at all that are parallel to AD in the figure ?

 

[ttpp1124]

Clearly, EB also points in a different direction than AB
If EB would be collinear, so would BE !Don't you see any lines at all that are parallel to AD in the figure ?

BC and FE

 

[BvU]

Correct. So, where are we now with this exercise ?

 

[Merlin3189]

I think Q b) remains