PhysChemTutor's answer to Nelson Loo's Junior College 2 H2 Maths Singapore question.
Hi, im kind of confused, resultant u+3v does not add up from u and v….Im still puzzled in getting the magnitude of 3v
This is vector. What do you mean? u + 3v is the vector sum. The angle between u and v is 79 degrees.
Magnitude of v is 4. Magnitude of 3 v is = 3×4.
But is the magnitude of u+3v is using just sqrt of u and 3v or…..?
They are not at right angles
I see that your concept on vector is weak. Revise first. I upload some related material for you later
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