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Math Help - Moment of Force

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    Moment of Force

    We are learning about moments. I have a question. The professor said that the Momemont vector can be expressed as,
    \bold{M}=\mbold{r}\times \bold{F}
    The question I have is are there any problems with this. Since the professor said the Moment changes signs depending on counterclockwise or not. Thus, I am asking if I use the cross-product I need not be concered about that, right?
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    Quote Originally Posted by ThePerfectHacker View Post
    We are learning about moments. I have a question. The professor said that the Momemont vector can be expressed as,
    \bold{M}=\mbold{r}\times \bold{F}
    The question I have is are there any problems with this. Since the professor said the Moment changes signs depending on counterclockwise or not. Thus, I am asking if I use the cross-product I need not be concered about that, right?
    So long as you are using a "right-hand rule" to get the direction for the cross product (which I believe is standard in Math too?) you will be fine. Typically in Physics, as well as in Math, CCW is considered to be a positive rotation.

    -Dan
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