Question

Find the value of c in the unit vector 0.2i + 0.5j + c k

Answer 1

Explanation:

maginitude of unit vector is one

$\sqrt{ {0.2}^{2} + {0.5}^{2} + {c}^{2} } = 1 \\ 0.4 + 0.25 + {c}^{2} = 1 \\ c = \sqrt{0.35}$