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- Thread starter jdief
- Start date Oct 2, 2012
If the magnitude of the sum of two vectors is less than the magnitude of either vector, then:
-the vectors must be parallel and in the same direction
-the scalar product of the vectors must be negative -none of these
-the scalar product of the vectors must be positive
-the vectors must be parallel and in opposite directions
Homework Equations
V1+V2=V3
A(dot)B=ABcos(θ)
The Attempt at a Solution
I know the answer is that the scalar product of the vectors must be negative, but I don't get why.
Answers and Replies
SammyS
If the magnitude of the sum of two vectors is less than the magnitude of either vector, then:
-the vectors must be parallel and in the same direction
-the scalar product of the vectors must be negative -none of these
-the scalar product of the vectors must be positive
-the vectors must be parallel and in opposite directions
Homework Equations
V1+V2=V3
A(dot)B=ABcos(θ)
The Attempt at a Solution
I know the answer is that the scalar product of the vectors must be negative, but I don't get why.
What have you tried?