Ex 10.2, 7 Find the unit vector in the direction of the vector 𝑎 ⃗ = 𝑖 ̂ + 𝑗 ̂ + 2𝑘 ̂ 𝑎 ⃗ = 𝑖 ̂ + 𝑗 ̂ + 2𝑘 ̂, = 1𝑖 ̂ + 1𝑗 ̂ + 2𝑘 ̂, Magnitude of 𝑎 ⃗ = √(12+12+22) |𝑎 ⃗ | = √(1+1+4) = √6 Unit vector in direction of 𝑎 ⃗ = 𝟏/|𝒂 ⃗ | . 𝒂 ⃗ 𝑎 ̂ = 1/√6 ["1" 𝑖 ̂" + 1" 𝑗 ̂" + 2" 𝑘 ̂ ] 𝑎 ̂ = 𝟏/√𝟔 𝒊 ̂ + 𝟏/√𝟔 𝒋 ̂ + 𝟐/√𝟔 𝒌 ̂

Next: Ex 10.2, 9 → Ask a doubt

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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