If you think about that act on P to go to T (end point of the vector) like:
you see that:
each coordinate is the coefficient of each of the fundamental vectors .
In this execise:
I must go now... later i'll complete it.
A force is given in the vector form, passes thru the point P whose coordinates are [1,2,2] in a cartesian coordinate system and are the unit vectors in the x,y and z directions respectively. Q is a point whose coordinates are [4,3,6].
i)Find the vector QP
ii)find the maqnitude the moment of the force about the point Q.
iii)Find the unit vector in the direction of the moment...
If its possible to sketch a diagram too would be great...I just cant understand VECTORS!
so we have the same ans for part 1. what about the other two parts?
|Moment| = | F x QP |
= | -15i+9j+9k |
= sqrt 387
on the right track?
than for last part:
unit vector in the direction of moment==> unit vector parallel with moment==> unit vector of moment.
which is -15i + 9j +9k?
is this the way?