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Saturday, 15 December 2012

Q.No.2.6: - Can the magnitude of a vector have a negative value?


Q.No.2.6: - Can the magnitude of a vector have a negative value?
Ans: - No, the magnitude of a vector cannot be a negative value it always has a positive value.
The magnitude of a vector is a scalar. As we know that a vector in 2-D have x and y component generally but its has a square root which have ± value means the vector may have a negative or a positive value but negative magnitude have no sense so we always take the positive value.
(Conceptual example: - For example height is a scalar quantity if we build a house then its height is always in upward direction means + direction if we say that we build a house in downward direction then what does it mean it seems very funny it has no proper sense.)

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