# How is force exerted by an object in collision calculated?

If a car crashes into a wall, what data would you need to calculate the force the car exerted on the wall upon impact?

Currently I’m thinking that you would need the cars mass and velocity(initial) to find the rate of change of momentum, but I remember being taught that rate of change of momentum is f=ma, where f is only the resultant force acting on the object (in this case the car) which isn’t what u want to know.

$$F=\frac{\text d p}{\text dt}$$ or $$\frac{\Delta p}{\Delta t}=\frac1{\Delta t}\int F\ \text dt=F_{avg}$$
• @UbaidHassan Yes it's the rate of change of momentum. I know you're "new to math" which is why I also supplied the simpler result of $F_{avg}=\Delta p/\Delta t$. The calculus you might not understand is just the derivation of this for readers who can understand it. – Aaron Stevens Apr 12 at 10:50