Questão 1
Questão
Is 5 m/s a vector.
Questão 2
Questão
What is the addition of the vectors V = (-2 ,5) and W = (7 , 9).
Responda
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VW = (5, 14)
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VW = ( 9 ,14)
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VW = ( 5, 4)
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VW = (9 ,5)
Questão 3
Questão
What happens when we multiply vector U = ( -3, 4) by scalar 5?
Responda
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U = ( 5, ,5)
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U = (-3,4)
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U = ( -15, 20)
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U = ( 15, 20)
Questão 4
Questão
What is the subtraction of vectors U = (-7, -3) and W = ( 5, -2)?
Responda
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UW = ( -2, -5)
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UW = ( 12, 1)
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UW = (2, 5)
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UW = (-12, -1)
Questão 5
Questão
What is the magnitude of the vector ( -1, -6)?
Responda
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sqrt (36 ) = 6.
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sqrt (37 )
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sqrt ( -7)
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sqrt ( 7)
Questão 6
Questão
If a = (-1, 2) and b = (-2,-3), and if c = -a + 3b, what is vector c?
Responda
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c = (-3, 1)
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c = ( 3, 1)
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c = ( -1, 5)
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c = (-5, 11)
Questão 7
Questão
If v ⃗ = (-2, 5), what is the magnitude and direction of v? Hint: For part 2, remember which quadrant the vector lies in.
Responda
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Magnitude is √29 , and direction is 261.8°
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Magnitude is √7 , and direction is 61.8°
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Magnitude is √3 , and direction is 21.3°
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Magnitude is √27 , and direction is 61.8°
Questão 8
Questão
Is -2 inches a vector?
Questão 9
Questão
When two vectors are perpendicular (right angles) to each other the dot product is zero?
Questão 10
Questão
Find the dot product of vectors v and w. Use the following diagram to answer the question. Round your answer to the nearest hundredth.
Responda
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25.384°
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20.433°
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28.432°
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22.273°