Momentum & thrust
Conservation of momentum explains why a rocket moves forward by throwing mass backwards — no air needed to push against.



Live science masterclass
A live stage show where momentum, combustion and aerodynamics are demonstrated with real thrust, real flame and real flight.
Ages 8+ · Schools · Festivals · Corporate
Five connected topics, each anchored by a live demonstration.
Conservation of momentum explains why a rocket moves forward by throwing mass backwards — no air needed to push against.
Fuel plus oxidiser equals hot gas. We compare solid, liquid and hybrid propellants and why an oxidiser must travel with the rocket.
How much energy hides in a gram of propellant, and why that number decides how high anything can fly.
A rocket flies straight only when the centre of mass sits ahead of the centre of pressure. We prove it by moving the fins.
Lift, drag and control surfaces — from a paper glider to a wing that carries hundreds of tonnes.
The centre of mass is where the vehicle balances. The centre of pressure is where aerodynamic forces act. Keep the centre of mass ahead of the centre of pressure and every gust pushes the nose back on course; reverse them and the vehicle tumbles. Fins move the centre of pressure backwards, which is why they sit at the tail.

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