problem01_48 - ^ 1.48: a) i ^ k j ^ 12 12 12 A 2 Ax 2 Ay 3...

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1.48: a) 1 3 1 1 1 ˆ ˆ ˆ 2 2 2 = + + = + + k j i so it is not a unit vector b) 2 2 2 z y x A A A + + = A If any component is greater than + 1 or less than –1, 1 A , so it cannot be a unit vector. A can have negative components since the minus sign goes away when the
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