Ex 10.3, 18
Last updated at Dec. 8, 2016 by Teachoo
Transcript
Ex 10.3, 18 If 𝑎 is a nonzero vector of magnitude ‘a’ and λ a nonzero scalar, then λ 𝑎 is unit vector if (A) λ = 1 (B) λ = – 1 (C) a = |λ| (D) a = 1 λ Given, magnitude of vector 𝑎 is ‘a’ So, 𝑎 = a For a non zero scalar ‘λ’ λ 𝑎 is a unit vector magnitude of λ 𝑎 is 1 So, λ 𝒂 = 1 λ 𝑎 = 1 λ 𝑎 = 1 𝑎 = 1 λ Hence D is the correct answer.
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