1. The problem statement, all variables and given/known data The strong man will push the two initially stationary freight cars of equal mass apart before he himself drops straight to the ground. Is it possible for him to give either of the cards a greater speed than the other? Why or why not? 2. Relevant equations None this is a theory question. 3. The attempt at a solution It is not possible for the strongman to push either of the cars with a greater speed than the other because when the man pushes against one car, he is using the other car as a brace. So the force of the man pushing on one car would create a reaction force against the second car. I am not really sure this is the right answer. I don't completely understand this concept about action and reaction forces yet.