- #1
jwxie
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This is not a homework question, just a coursework reading.
Please look at the figure on the right hand side
R = A+B
R = A - B
So I tried to understand the concept of subtracting vectors.
I want to do the adding convention instead of subtracting them.
If I move A to connect to B (Tip Tail method), then I would have C (resultant) in an opposition direction (now going up from B to A).
So I thought C = B+A, yet since the original problem is opposite direction, I say C = -(B+A)
But that's wrong since C = A - B
For the figure on the left hand. I can do the adding convention.
Reverse the initial B to positive direction (dot line), and so C = A + B.
Therefore, the actual answer is just C = A + (-B)
Please help me to correct my misunderstanding with subtracting vector. I remember back in high school my teacher told me NEVER THINK ABOUT SUBTRACTING, DO ADDING.
The reason I want to understand is that, if the question asks me "bases on the figure on the right hand, find C" I would be wrong
Homework Statement
Please look at the figure on the right hand side
Homework Equations
R = A+B
R = A - B
The Attempt at a Solution
So I tried to understand the concept of subtracting vectors.
I want to do the adding convention instead of subtracting them.
If I move A to connect to B (Tip Tail method), then I would have C (resultant) in an opposition direction (now going up from B to A).
So I thought C = B+A, yet since the original problem is opposite direction, I say C = -(B+A)
But that's wrong since C = A - B
For the figure on the left hand. I can do the adding convention.
Reverse the initial B to positive direction (dot line), and so C = A + B.
Therefore, the actual answer is just C = A + (-B)
Please help me to correct my misunderstanding with subtracting vector. I remember back in high school my teacher told me NEVER THINK ABOUT SUBTRACTING, DO ADDING.
The reason I want to understand is that, if the question asks me "bases on the figure on the right hand, find C" I would be wrong