1. Consider the two vectors P and Q. The definition of P is P = 􀀃i × (􀀃i × 􀀃j). The

Question

definition of Q is Q = (􀀃i × 􀀃i) × 􀀃j .
a. The magnitude of P is equal to the magnitude of Q.
b. The magnitude of P is greater than the magnitude of Q.
c. The magnitude of P is less than the magnitude of Q.

Is the answer A

Answer 1

P
(i x j) = k
i x k = -j

Q
i x i = 0
0 x j = 0

so|P| > |Q|