mass and gravity

Unity Engine
1

Ok, I’m very confused with the ‘mass’ number. How are we supposed to calculate it?
It seems to be pretty random between 0.1 and 10 :?

I’m trying to figure out, how much upward force I would need to apply to rigidbody.addForce(up) to lift a car. I want it to be more or less realistic.

Things I know:
Gravity = 9.81 force down
Car weights = 800kgs

If I remember correctly, mass = weight / force
so mass should be = 800 / 9.81 = 81.54
that number is way over the maximum of 10 suggested.

If I want to lift the 800kgs car, should I apply a force of 9.81? 20? 300? I don’t know what’s the formula unity is using for it.

2

Mass is completely arbitrary and only matters in relation to other objects. You can make your car have a mass of 1 and that’s fine. Just make sure that something that should have 10X more mass than the car has a mass of 10, and something that should have 10X less mass has a mass of 0.1.

–Eric