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from Ekeeda Hello everyone in the last
lecture we have seen the concepts
related to the rectangular coordinate
system today let us begin with simple
problems based on to the concepts in the
rectangular coordinate system specify
the unit vector extending from the
origin toward the point capital G to
minus 2 minus 1 now after we read the
problem statement my suggestion is to
always draw the graphical representation
of the given data into the problem
statement so that the exact situation
what is given and what we need to
evaluate shall be clear so in this
problem a point is given capital G 2
minus 2 minus 1 I draw the rectangular
coordinate system structure
ahead axis x axis y axis so x heaven -
why having - to say heaven - one so i
mark x equal to two units y equal to
minus two I have to do - one - two lines
parallel to X and y intercept here so
this point is let us say G - having
coordinates 2 - 2 and 0 we want it to
minus 1 so I have to lower it down by 1
unit in the three-dimensional space so
this point will be capital G 2 minus 2
minus 1 so we got the point
we need unit vector extending from
origin so origin is intersection of
three axis XYZ so a vector from this
origin towards this particular point we
want so let us get the value now the
vector joining origin to point G we can
represent you G bar it is equal to 2 - 0
AF Square
finding a vector we always subtract the
coordinate of starting point from the
coordinates of ending point of the
vector
now unit vector is given by vector
divided by its magnitude so for the
given Delta unit vector maybe
the magnitude of hozeva in the
denominator will be given
so the final answer will be
thank you
you
