It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
originally posted by: NicSign
Rockets require external resistance, like an atmosphere to push off of. The rocket does not give its exhaust momentum, the momentum is given by pressure gradient force. Just like when you drop an object from a height, your hand doesn't give the object momentum, gravity does. if the object falls fast enough and meets resistance, like the floor, it might bounce back and hit you.
"Conservation of momentum is a fundamental law of physics which states that the momentum of a system is constant if there are no external forces acting on the system. It is embodied in Newton's first law (the law of inertia)."
required to be done, achieved, or present; needed; essential.
"it's not necessary for you to be here"
need to know definition
The term "need to know", when used by government and other organizations, describes the restriction of data which is considered very sensitive.
In space, rockets zoom around with no air to push against. ... Rockets and engines in space behave according to Isaac Newton's third law of motion: Every action produces an equal and opposite reaction. When a rocket shoots fuel out one end, this propels the rocket forward — no air is required.Apr 9, 2013
How Do Space Rockets Work Without Air? - Live Science
So dark when we've lost our way
Way out here in outer space
The memories are all I've saved tonight
You flew me to the highest highs
Never thought you would ever quit on me
And I can't stop falling there's no fighting gravity whoa
And I'm crashing through the atmosphere
Without you I'm gasping it's hard to breathe
And I keep on stalling there's no fighting gravity