Hello,

The rocket works because of the law of conservation of linear momentum. The law of conservation of linear momentum is very important in physics. Momentum is defined as the mass of an object times its velocity. Newtons third law of motion works on the rocket. It states that, 'to every action, there is always an equal and opposite reaction'. In the case of a rocket, the engine emits hot burning gases in the downward direction. These gases apply an equal and opposite reaction force to the rocket in the upward direction. This is how a rocket is propelled.