If A = 4î − 2ĵ and B = −î + 6ĵ, what is the magnitude of A + B?
Correct answer C. 5 units
Explanation
Adding components: A + B = (4 − 1)î + (−2 + 6)ĵ = 3î + 4ĵ. Its magnitude is √(3² + 4²) = 5 units.
Answer checked How we write and check questions
Discussion