Find the vector in the direction of vector ā=ī-2j that has magnitude 7 units
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A vector in direction of vector a, is parallel to a
Let it be → b= d(i - 2j) = (d) i - (2d) j
|b|=7 = √(d² + (-2d)²) = √5d² = d√5
∴ d=7/√5
∴vector b in direction of vector a , with magnitude 7 is (7/√5)(i - 2j).
Let it be → b= d(i - 2j) = (d) i - (2d) j
|b|=7 = √(d² + (-2d)²) = √5d² = d√5
∴ d=7/√5
∴vector b in direction of vector a , with magnitude 7 is (7/√5)(i - 2j).
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