In a collision the colliding particles will in general have different velocities at different instants of time. Overall this means that the particles can easily cover different distances during a collision and thus have different amounts of work done on them. My question is: Will the difference in the distance covered by our two particles be in accordance with the difference of the change in kinetic energy between our two particles? This is probably a weird question, but I'm just trying to get a good intuition for what happens in terms of forces on the microscopic level during a collision. And with the above way of thinking it would more or less seem that the relative changes in kinetic energy of the particles are decided by conservation of momentum, and that just sounds a bit weird.