True or false: Kepler's laws

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Kepler's second law follows from angular momentum conservation.

2. Statement is true

   No

   Statement

   That derivation needs an inverse square law specifically.

3. Statement is true

   Yes

   Statement

   It holds for any central force.

4. Statement is true

   Yes

   Statement

   Kepler's third law relates period squared to radius cubed.

5. Statement is true

   Yes

   Statement

   Its constant is shared by all planets in circular orbits.

Explanation