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PeacefulPumpkin8091

Hello,

How do you know when to use ā with an arrow compared to none at when using the acceleration formula from chapter 2 UARM?

I understand that the arrow represents a vector but I still don't understand why the book shows one with the arrow and the other not.

Thank you,

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Léo B

Hi PeacefulPumpkin8091, thanks for your question !

You already got it right ! When you use an arrow, it's to tell the reader that this data is a vector. Which means 2 things : this data has a value AND this data has an orientation (with the use of coordinates).

On the contrary, when you don't use an arrow, it means that the data is scalar. So the data has a value, but does not have an orientation.

Here's a link if you want to read more about vectors: https://www.alloprof.qc.ca/en/students/vl/mathematics/vectors-m1298

Feel free to write again if you have any question !