Kepler Laws
What nationality was Kepler?
German
What goes up must come ?
down
planets apparently moving "backwards"
retrograde
heliocentric theory
Copernicus
Newtons second law or formula for Force
F = ma
Keplers First Law
Sun is at the foci of orbit
Newtons first law
objects rest or stay in motion until acted on by outside force
name the 8 planets in order,
M, V, E, M, J, S, U, N
geocentric model
Ptolemy
Keplers third law on orbits and time
P2 = A3
Keplers Third Law
Period2 = AU3
Newtons third law
to every action is an equal opposite reaction
what are movements of smaller circles, along a path of a larger circle . What are the small and large circles called?
epicycles and deferent
Mathematician by trade
Kepler or Newton
gravitation on earth
g = -9.8 m/sec2 or -32ft/sec2
Kepler second Law
a line from sun to planet sweep out equal areas of ellipse, or planets move faster the closer they are to sun
Newtons second law
F = ma
this planet is 1.52 AU from sun
Mars
developed theories on motion and gravity
Issac Newton
inverse square law (hint: use G as gravitational constant)
F= Gm1m2/r2
planet has the most elliptical orbit
Mercury
What is the value of G
6.67 X 10-11
this planet is 0.3 AU from earth
Venus! not Mercury
Italian philosopher
Galileo Galilie
Math formula for energy
E = mc2