Science of Rockets

Rockets Development - A rocket is a device expelling gas in one direction to move the rocket in the opposite direction. - Rocket technology originated from China in the 1100s.

Origin of Rockets The Chinese developed the first rockets – Simple arrows coated with flammable powder and shot with a bows In the 1200s, Chinese began using gunpowder In the 1800s, British improved rocketry during War of 1812 In the early 1900s, modern rockets were first developed

How Rockets Work An ESSENTIAL feature of a rocket is that expels (releases) gas in one direction A rocket demos Newton’s Second and Third Law of Motion – Second Law: how force, mass, and acceleration are related – **Third Law : for every action there is an equal or opposite reaction

Rockets and Physics Thrust is the reaction force that propels the rocket forward – Mass and speed of gases propelled affects the amount of thrust Velocity is speed in a given direction – Greater the thrust, greater the velocity of a rocket

Velocity Rockets must reach a certain velocity in order to go into orbit Orbital Velocity – velocity a rocket must achieve to establish an orbit around Earth Escape Velocity – velocity a rocket must reach to fly beyond a planet’s gravitational pull. – Rockets needs to leave Earth in 40,200 km per hour

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