Instructions: On occasion, the notation
will be a shorthand notation for
.
If two collinear vectors and
are added, the resultant has a magnitude equal to 4.0. If
is subtracted from
, the resultant has a magnitude equal to 8.0. What is the magnitude of
?
A. 2.0
B. 3.0
C. 4.0
D. 5.0
E. 6.0
Answer: A
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