1. History of rockets rocket a device that expels gases in one direction to move in the opposite direction History of rockets  originated in China - 1100’s arrows coated and set on fire - 1200’s using gun powder inside rockets  British - 1800’s used rockets against Americans War of 1812, “Star Spangled Banner”

2. Modern Rockets  early 1900’s advanced designs - Konstantin Tsiolkovsky (Russian) - Robert Goddard ( American)  Major advances - Wernher von Bruan World War II designed German’s V2 rocket came to US to work in space program

3. How do rockets work? a rocket moves forward when gases shooting out the back of the rocket push it in the opposite direction Newton’s Third Law of Motion For every action there is an equal and opposite reaction thrustthe reaction force that propels a rocket forward velocityspeed in a given direction orbital the velocity a rocket must achieve to establish velocity orbit around Earth

4. escapethe velocity a rocket must reach to fly beyond velocitya planet’s gravitational pull Rocket Fuel solid fuel dry chemical mixed with oxygen liquid fuel both oxygen and fuel are liquid, separate containers until mixed ion fuel expel gas ions at high speed less thrust, fuel efficient. Multistage rockets main advantage is that the total weight of the rocket is greatly reduced as rocket rises Saturn V rockets – made it possible to reach the moon and beyond