OnlineCBT
Physics · GRAVITATION
हिन्दीGiven below are statements regarding planetary motion: (A) Kepler's second law (law of areas) is a direct consequence of the conservation of angular momentum. (B) The linear speed of a planet is maximum when it is at perihelion. (C) A central force exerts zero torque about the centre of force. (D) For any planet, the ratio \( T^2 / a^3 \) depends strongly on the planet's mass \( m \). Choose the correct answer from the options given below:
Correct answer · Option 3
(A), (B) and (C) only
Explanation
(A), (B), and (C) are correct. (D) is incorrect because \( T^2/a^3 \) is a universal constant for all planets revolving around the same Sun, independent of planet mass \( m \ll M_S \).
