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

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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. books.google.dk/… –  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
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1 Answer 1

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 $$\bf{F} = (\bf{a} \bullet \hat{\bf{b}}) \hat{\bf{b}}.$$

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