I have been thinking of this problem quite long time, but couldn't find the solution: Assume that we can measure only the velocity, v, of an object with mass, m, when it hits a rigid and stationary object. How can I calculate the amount of force applied by that hitting object? The applied force would increase from zero to its maximum and then decrease to zero during the hit. So, I am asking the maximum force.
On the other hand, I wonder if my assumption, which is only v can be measured at the moment of hit, was proper.