Please help. I dont know if this is the right subject to put this question but, can you please help me with this question? How did he get this vector diagram? I really can't think of a reason why..

Question

radicalsniper · Answer

attachment

roadjester · Answer

The vector diagram has been flipped

radicalsniper · Answer

What do you mean?

radicalsniper · Answer

Sorry I can't understand. I am new to this topic

roadjester · Answer

It looks like the drawn vector diagram is a mirror image of the one printed

roadjester · Answer

Who drew the vector diagram?

radicalsniper · Answer

You can see the pdf here. I really can't understand how to create vector diagram.. No idea how to start or end. I ddn't understand what my teacher taught us. http://academics.utep.edu/LinkClick.aspx?link=Dynamics+Short+Test+Monday,+March+7+Solution.pdf&tabid=8561&mid=32485

roadjester · Answer

ok notice the vector diagram drawn? It's a triangle. Turn that triangle until you can fit it onto the printed triangle and you'll see how it was done. Does that "sorta" make sense?

roadjester · Answer

get the angles to overlap/match

vincent-lyon.fr · Answer

Nothing has been flipped at all.

If the rod is going down, then $\vec V_A$ is vertical down and $\vec V_B$ is along the plane.

Then the vectorial equation $\vec V_B =\vec V_A+\vec V_{B/A}$ will end up as one of the following triangles :|dw:1393788941968:dw|

anonymous · Answer

Yea nothing is flipped.. see i marked your drawing.. to show you that the vectors that he has draw is exactly in the same direction as given in the question

maybe your confusion arrived because, he shifted their relative locations? 
you are always free to shift positions of vectors.. anywhere.. (but not free to ROTATE them .. ) these are called as free vectors