Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Has this example something to do with vector projection?enter image description here

share|cite|improve this question
Can you please add a reference as to where you got this from? Regards – Amzoti Jan 8 '13 at 22:23
It is from this book.… – Reader Jan 8 '13 at 22:25
Yes. The force $\textbf{F}$ can be given by $(\textbf{a} \bullet \hat{\textbf{b}}) \hat{\textbf{b}}$ where $\hat{\textbf{b}}$ is the unit vector in the direction of b. – Andrew D Jan 8 '13 at 22:26

I cannot access the link you provide to better understand the context of the problem.

But I'll venture to answer:

Yes, this example involves a vector projection:

Specifically, let $\bf{F}$ denote force, and $\hat{\bf{b}}$ denote the unit vector in the direction b. Then $$\bf{F} = (\bf{a} \bullet \hat{\bf{b}}) \hat{\bf{b}}.$$

share|cite|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.