其實 line of action of vector F 係指邊條線, 有冇咩意思,
請指教
thx
更新1:
係applied math, 96-I-4(b) 係咁問的 vectorF1=a(i+2j) act on point (5,4) vectorF2=b(-2i+j) act on point (2,3) If the lines of action of F1 and F2 intersect at a point C, find the corrdinaties of C.
更新2:
marking 係咁寫: Line of action vector F1=5i+4j+m(i+2j) Line of action vector F2=2i+3j+n(-2i+j) By compare two vector, m=n=-1 point C (4,2) 呢道點解Line of action vector F1=5i+4j+m(i+2j) = position vector +m(vector of force)??