Planetary Motion & Gravitation (Physics 7.1)

Planetary Motion & Gravitation (Physics 7.1)

Multiple Choice

Kepler's _____ Law states that the paths of the planets are ellipses, with the Sun at the center.

• 1st

• 2nd

• 3rd

• 4th

Multiple Choice

"An imaginary line from the Sun to a planet sweeps out equal areas in equal time intervals" is...

• Kepler's 1st Law

• Newton's 2nd Law

• Kepler's 2nd Law

• Newton's 3rd Law

Multiple Choice

"the square of the ratio of the periods of any two planets revolving about the Sun is equal to the cube of the ratio of their average distances from the Sun" is ________, also written as

 $\left(\frac{T_A}{T_B}\right)^2\ =\ \left(\frac{r_A}{r_B}\right)^3$  

• Newton's 2nd Law

• Kepler's 2nd Law

• Kepler's 1st Law

• Kepler's 3rd Law