Osm Physics by Ashish

  🚀 Rockets – The Basics A rocket is a vehicle, missile, or aircraft that obtains thrust from a rocket engine. Rocket engines work on Newton's Third Law : for every action, there is an equal and opposite reaction. The engine expels mass (exhaust gases) at high speed in one direction, pushing the rocket in the opposite direction. Key Principles Thrust is generated by expelling high-velocity exhaust (Newton's 3rd Law) They carry their own oxidizer , so they work in the vacuum of space (unlike jet engines which need atmospheric oxygen) Governed by the Tsiolkovsky rocket equation : Δ v = v e ln ⁡ ( m 0 m f ) Δ v = v e ​ ln ( m f ​ m 0 ​ ​ ) Where: Δ v Δ v = change in velocity (the "budget" for a mission) v e v e ​  = exhaust velocity m 0 m 0 ​  = initial mass (fully fueled) m f m f ​  = final mass (empty) 🪜 Multistage Rockets – The Solution to Gravity A multistage rocket (or staging rocket) uses two or more stages, each with its own engines and propellant. This is ...