If bar a = i - j + k and bar b = 2i -2j k. What is the projection of a non b?

Question

If \(\bar a\) = i – j + k and \(\bar b\) = 2i – 2j –k. What is the projection of a on b?

Answer 1

(ii) Projection of

\(\bar a \,on \, \bar b\) = \(\frac{\bar a . \bar b}{|\bar b|}\) = \(\frac{2 + 2 - 1}{\sqrt{4 + 4 + 1}}\) = 1