The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.

Having read the above passage, choose the right answer to the following question (choices are the rocket with highest gas velocity or the rocket with lowest gas velocity ):


Boris was tasked with developing a hypersonic rocket. He built two prototypes that were identical except that they have different gas velocities out of the nozzle. Which rocket was likely the fastest the rocket with highest gas velocity or the rocket with lowest gas velocity? 

