Question

(ii) In the following figure, an orbit of a planet around the Sun (S) has been
shown. AB and CD are the distances covered by the planet in equal time.
Lines AS and CS sweep equal areas in equal intervals of time. Hence, areas
ASB and CSD are equal.

Questions :
(a) Which laws do we understand from the above description?
(b) Write the law regarding area swept.
(c) Write the law T square is directly proportional to r cube in your words.​

Answer 1

Answer:

a) we understood all the three laws given by Kepler

which are as follows

1.)Every planets orbit is an ellipse with the sun at one of its focii

2) a line joining the Sun and a planet sweeps out equal areas in equal times;

3) The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit

b) a line joining the Sun and a planet sweeps out equal areas in equal times;

c) The square of period of revolution of a planet is directly proportional to the cube of mean distance between the planet and the sun

Answer 2

(a) From the given description we understand Kepler's three laws.

(b) Kepler's law of areas: The line joining the planet and the Sun sweeps equal areas in equal intervals of time.

(c) Kepler's law of periods: The square of the period of revolution of a planet around the Sun is directly proportional to the cube of the mean distance of the planet from the Sun.

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hope it helped.