Motion an Gravity Flashcards
1
Q
Kepler Law 1:
A
Orbits are in the shape of ellipses
2
Q
Eccentricity is
A
Half of the distance between foci divided by semi major axis
3
Q
eccentricity is bewteen
A
0 and 1
4
Q
Kepler Law 2:
A
A line joining the sun and planet sweeps out equal areas in equal times.
5
Q
Planets move _____ near the sun.
A
faster
6
Q
Kepler Law 3:
A
P2=a3
7
Q
P stands for
A
orbital periods in years
8
Q
a stands for
A
Orbit semi major axis (au)
9
Q
Find a using P2=a3:
A
a=P2/3
10
Q
Find P using P2=a3
A
P=a3/2
11
Q
What is speed?
A
Rate of motion
12
Q
What is velocity?
A
Speed and direction
13
Q
What is acceleration?
A
Change in velocity
14
Q
Speed Motion I: Free Fall
A
moving w no external forces
Straight line
constant speed/velocity
15
Q
Special Motion II: Free Fall
A
Motion due to gravity only
gravity causes acceleration
fall at the same time
