how to retrieve de force of a collision?

Unity Engine
1

Hi,
I am looking for the force of a collision. Basically I need to know if a impact is lethal or not and the best way of measuring that would be by the force of a impact.

how does one retrieve the force of impact?

2

classical physics terms for simple point-objects says…

energy (in joules) = 1/2 * mass * velocity^2

you can check the relative velocity of a rigidbody collision by using the Collision.velocity property

3

What about

Force (in Newtons: Kgm/s^2) = mass*acceleration

If you use rigidbody.AddForce(…,ForceMode.Force) It’s expecting a Newtonian force.

EDIT:

Now that I re-read your question I realize that you want the first (energy) formula, because you just want to know the energy of the impact.