Space Flashcards
Projectile motion vertical formulas
v^2 = u^2 + 2 a y
y = ut + 0.5at^2
V = u + at
u = usintheta
Gravitational potential energy
E = mgh
GPE = -Gm1 m2/ r
Projectile motion horizontal formulas
v^2 = u^2
Delta x = u t
V = u + at
u = ucostheta
Escape velocity formula
V = square root of 2Gm/r
Where
m = mass of planet
r = radius of planet
G forces formula
g+a/g
Goddards contribution to space exploration
Liquid propellant H2 O2 under pressure are a better mix.
Nozzle for mixing
Changing acceleration of rockets formula
a = T-mg/m
Uniform circular motion
F = ma = mv^2/r
➗by m
= v^2/r
Orbital velocity formula
v = square root of GM/r
Keplars law of periods
r^3/T^2 = GM/4pi^2
For two objects around same distant object:
r1^3/T1^2 = r2^3/T2^2
Issues upon re entry in a rocket
Communication blackout due to ionisation blackout. Heat ionises the air and radio signals and cannot penetrate layer of ions.
Shallow angle do reentry and shuttle would “bounce off” atmospher into space. Too steep of an angle and heat would cause damage and would not be able to slow down.
Newtons law of universal gravitational
F = G m1m2/d^2
What is a 3 stage rocket launch
Used to reduce the g forces on astronauts, rockets are shut off then re booted.
Einstein special theory of relativity
- All motion is relative - principle of relativity holds in all situations
- Speed of light is constant regardless of the observers frame of reference.
- The aether is not needed to explain light and in fact does not exist.
What are inertial and non inertial frames of reference ?
Inertial - not accelerating
Non inertial - accelerating, motion is detectable. Principle of theory of relativity des not hold in this frame of reference.
