Simple Harmonic Motion Gravitation MCQs App Download & PDF e-Book | 647

Kepler's 3rd law states that...

1. the periods of revolution of the planets are proportional to the cube of their mean distances from sun
2. the periods of revolution of the planets are inversely proportional to the cube of their mean distances from sun
3. the squares of the periods of revolution of the planets are proportional to the cube of their mean distance from sun
4. the squares of the periods of revolution of the planets are inversely proportional to the cube of their mean distance from sun