
Anonymous A. answered 05/24/19
Astrophysics at Caltech/NASA Jet Propulson Laboratory
What you're likely thinking of is vector dot product. You add the product of each component to itself. e.g.
v*v = (2*2) + (3*3)
The result is a scalar value.
James S.
asked 05/24/19If vector v = 2i + 3j,
How do I solve v times v?
Anonymous A. answered 05/24/19
Astrophysics at Caltech/NASA Jet Propulson Laboratory
What you're likely thinking of is vector dot product. You add the product of each component to itself. e.g.
v*v = (2*2) + (3*3)
The result is a scalar value.
Timothy C. answered 05/24/19
Math Prof with 20+ Years of Teaching Experience-College & AP Calculus
In two dimensions, the typical product of two vectors that one defines is the dot product.
If v = ai + bj and w = ci+dj, then the dot product of v and w is defined by
v•w = ac + bd. Note that this product is a number rather than another vector.
In your example with v = 2i+ 3j, we have
v•v = (2i+3j)•(2i+3j) = 2(2) + 3(3) = 13.
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