Ancient Astronomy and Gravity/Orbits and Tides Flashcards
1
Q
Aristarchus
A
Suggested a sun-centered solar system
2
Q
Kepler first law
A
the orbit of each planet is an ellipse (oval shape) with the sun at one focus
3
Q
Keplers second law
A
As a planet orbits it sweeps out equal areas in equal times
4
Q
Kepler’s third law
A
More distant planets orbit at a slower average speed
5
Q
what did Galileo observe
A
moons orbiting Jupiter, craters on the moon, and sunspots on the sun
6
Q
Newtons first law
A
an object moves at constant velocity when there is no net force acting on it
7
Q
Newtons second law
A
the amount of acceleration depends on object’s mass and the next force applied
8
Q
F = ma
A
Force = mass x acceleration
9
Q
Newtons third law
A
for every force, there is an equal force in the opposite direction
