Gravity is technically 9.81 m/s².

But most of the time, 10 works. Maybe it won't be precise, but it will get you there. And from there you can make it perfect. If you wait for everything to be perfect first, you might not even get to start.

But this doesn't mean gravity is 300. You still have to put in the effort to get to where you want. Just don't let perfection stop you.

So why gravity equals 10?

Because that's enough.

I believe in this. Enough so that I will make an airplane using this number in all my calculations. Stay tuned for that :)