Question

State three Kepler's law of planetary motion. [3 MARKS]

Answer 1

Each point: 1 Mark

First law: All planets revolve round the sun in eliptical orbits with sun at one of the foci.
Second law: A line joining any planet to the sun sweeps out equal areas in equal intervals of time.
Third law: The square of the period of any planet around the sun is proportional to the cube of the planet's mean distance from the sun.