(a) State Kepler’s third law of planetary motion. (b) Explain qualitatively how the…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
(a) State Kepler’s third law of planetary motion.
(b) Explain qualitatively how the balance between the gravitational attraction of the Sun on a planet and the centripetal requirement of uniform circular motion leads to the proportionality T2∝r3.
(c) Why does this proportionality imply that planets farther from the Sun move more slowly along their orbits than the inner planets?