May the force be with you.

[Rademanc]

I need to know how hard two bodies collided. How hard the impact is.
I have a EventHandlerInitialCollisionDetected method for when the entities collide, but I have no idea how to calculate the force of the impact.
Can you help?

[Norbo]

The CollisionPair associated with the event has a list of contacts in it. Each contact has a normalImpulseTotal field amongst others. The normal impulse represents the magnitude of the impulse required to keep the objects from interpenetrating, and is a good measure of 'impact force.'

[Rademanc]

Thanks for all the help so far Norbo. You are really making my game possible.