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8 Cards in this Set
- Front
- Back
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What does "the magnitude of a vector is a scalar" mean?
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a scalar represents the magnitude of a physical quantity.
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If two vectors have unequal magnitudes, can their sum be zero?
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no, must be equal and opposite.
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What is the relationship between instantaneous speed and instantaneous velocity?
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speed is the magnitude of velocity.
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Is it possible to add a vector quantity to a scalar quantity?
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no, because the scalar quantity has no direction.
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If a set of vectors laid head to tail forms a closed polygon, the resultant is zero. Is this statement true?
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Yes, the distance from the tail of the first vector to the head of the last vector is zero.
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Can a vector have a component equal to zero and still have a nonzero magnitude?
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yes, the second component could be nonzero.
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If A+B=0, what can you say about the components of the two vectors?
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They are equal and opposite.
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Under what circumstances would a vector have components that are equal in magnitude?
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oriented at 45 degrees from the axis.
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