The amount of exposed surface area of the fuel
Internal pressure. As the rocket propellent burns, the gases expand. The longer it burns, the inside of the rocket increases in volume and this could decrease the pressure. As the pressure drops, the thrust will also decrease. Also, as the rocket flies higher into the air, the outside air pressure can have an effect on the rocket's internal pressures and its thrust.
thrust of the rocket engine
payload
Payload (apex)
Chemical rocket
Chemical rocket
thrust of the rocket engine
Thrust is the amount of power generated by the engine.
payload
Payload (apex)
Rockets are propelled forward by thrust generated by the combustion of rocket fuel and controlling the direction of the exhaust.
Thrust
Rocket engines obtain their thrust in accordance with Isaac Newton's third law, making the rocket a reaction engine. A rocket engine is simply a jet engine.
The size of the engine you put in it.
Provide thrust ... which changes velocity.
Chemical rocket
Chemical rocket
control