How to Find Scalars and Unit Vectors from Given Vectors?

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The discussion focuses on calculating scalars and unit vectors from given vectors A and B, specifically A = 6i - 8j m and B = -8i + 3j m. The length of vector A is determined to be 10 meters, calculated using the formula |A| = √(6² + (-8)²). For vector B, the length is found to be √73 meters, derived from |B| = √((-8)² + 3²). The conversation emphasizes the importance of correctly interpreting vector notation and applying the Pythagorean theorem for vector magnitudes.

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A=6i-8j m, B= -8i=3j m

I know how to add and multiply vectors, but how do I find the two scalars of a and b?
Also, I can’t figure out how to find the unit vector and direction of Resultant Vectors.

Please Help!

Thanks

Amil
 
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What two scalars of a and b?

I will assume that you really meant A and B, rather than a and b, but still there are many ways to get scalars from vectors. I am less sure about assuming that you meant the length of the vectors. That is defined as the square root of the sum of the squares of the components.

In particular, if A=6i-8j m(eters?) then the length of A is |A|= [itex]\sqrt{6^2+ (-8)^2}= \sqrt{36+64}= \sqrt{100}[/itex]= 10 meters.

If B= -8i=3j m (this was supposed to be -8i+ 3j, right?), then the length of B is
|B|= [itex]\sqrt{(-8)^2+ 3^2}= \sqrt{64+9}= \sqrt{73}[/itex] meters.
 

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