Answer
$A ⃗×B ⃗=-43k ⃗$
Magnitude=43
Work Step by Step
$A ⃗=4.00i ⃗+7.00j ⃗$ & $B ⃗=5.00i ⃗-2.00j ⃗$
Crossproduct:
$A ⃗×B ⃗=(7.00×0+2.00×0)i ⃗-(4.00×0-5.00×0)j ⃗+(4.00×-2.00-7.00×5.00) k ⃗=-43k ⃗$
The magnitude is 43
University Physics with Modern Physics (14th Edition)
by Young, Hugh D.; Freedman, Roger A.
Published by
Pearson
ISBN 10:
0321973615
ISBN 13:
978-0-32197-361-0
Chapter 1 - Units, Physical Quantities, and Vectors - Problems - Exercises - Page 29: 1.44
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