Question

Which of the following graphs represents the motion of a planet moving about the sun?

Answer 1

it's graph number d which is curve

Answer 2

Answer:

Graph C

Explanation:

According to the Kepler's law of periods, the line joining any planet to the sun will sweep out the equal areas in equal interval of time. Therefore, the rate of change of area with the time will be constant. The square of the time period of any planet is directly proportional to the cube of the semi major axis of its orbit.

Thus, kepler’s law is represented as -  T2 ∝ R3

Hence the graph should be linear. Out of the given graphs C is a linear graph.