A rocket has a mass of 1.2kg and is acted upon by an impulse from the engine of 130.5 N s during the 2 seconds the engine is firing. Determine the average net force acting on the rocket while the engine fired? I think this is 78.3N?? Determine the speed of the rocket at the end of the 2.0s interval? Determine the maximum height of the rocket? I believe I have the net force question figured out but I don't know how to find the speed and max height.