Is there a way that the kinetic energy of a moving object can be locally and internally absorbed or otherwise altered without outside influence? For example, let's say that I have a container that has been fired out of a cannon at 100 mph. Now, this container has an abundant internal energy source available for anything expect outside thrust, as outside thrust is not permitted in any way(for this experiment) Since the internal mass of the container is a direct function of the containers kinetic energy, can the internal mass be manipulated in-flight such to where the manipulation changes the strength or vectors of the containers kinetic energy? Again, for example, if there were 2 lead balls of x-amount of weight affixed on the inside side walls of the container, and the internal energy source cause them to be violently pulled together towards the center of the container, does this action in any way affect the total kinetic energy of the containers motion? Thank you greatly for your time and expertise.