The rocket equation is a fundamental equation in astronautics that describes the relationship between the mass of a rocket, the speed of its exhaust, and the resulting velocity change (delta-v) it can achieve. It is expressed as follows:
Parameters:
- (Change in Velocity):
- Definition: The change in velocity the rocket experiences during its powered phase.
- Unit: meters per second (m/s).
- (Specific Impulse):
- Definition: A measure of the efficiency of a rocket engine. It is the thrust produced per unit mass of propellant consumed.
- Unit: seconds (s).
- (Acceleration Due to Gravity at Earth’s Surface):
- Definition: The standard acceleration due to gravity on the Earth’s surface.
- Value: Approximately 9.81 m/S2.
- (Initial Mass of the Rocket):
- Definition: The total mass of the rocket at the beginning of the powered phase, including the mass of the propellant.
- Unit: kilograms (kg).
- (Final Mass of the Rocket or Burnout Mass):
- Definition: The mass of the rocket at the moment when the propellant is completely consumed (burnout).
- Unit: kilograms (kg).