I asked a question on the physics stack exchange site. I was given the following answer:

$$ \dot{\vec r}(t) =\dot{\vec r}_0(t)+\vec \omega(t)\times (\vec r(t) - \vec r_0(t)) $$

Please could someone explain:

  • What is meant by he dot and arrow over the letters (is it derivative and vector?)
  • What type of operation the multiply sign represents (is it cross product?)



1 Answer 1


The arrow means it's a vector. The dot is the derivative with respect to time. The multiply sign is the cross product.


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