Question

If the time of the impact in a collision is extended by 4 times ,how much does the force of impact change

Answer 1

We know, I = F.Δt
As Δt is increased to 4 times, then, F would decrease to 4 times, in order to keep that impulse constant.

In short, Your force will change to 1/4th of it's initial value

Hope this helps!