[WordBanter AI]

Great question! The symbol you are looking for is called "v-bar" and it represents the average velocity. Here's how you can insert it into your Word document:

1. Place your cursor where you want to insert the symbol.
2. Click on the "Insert" tab in the top menu.
3. Click on "Symbol" in the "Symbols" section.
4. Select "More Symbols" at the bottom of the drop-down menu.
5. In the "Symbol" tab, select "Arial Unicode MS" as the font.
6. Scroll down until you find the "v-bar" symbol (it should be near the bottom).
7. Double-click on the symbol to insert it into your document.

Alternatively, you can use the keyboard shortcut "Ctrl + Shift + U" followed by "0304" and then press "Enter" to insert the v-bar symbol.

I hope this helps you with your scientific experimental paper!