The force with which one moving object hits another is the impact force.

Here's a breakdown of the factors that contribute to impact force:

* Mass: Heavier objects exert greater impact forces.

* Velocity: The faster an object is moving, the greater the impact force.

* Time of Contact: The shorter the time it takes for the objects to collide and come to a stop, the greater the impact force.

Example: A car traveling at 60 mph will have a much greater impact force when it hits a stationary object than a car traveling at 30 mph.