The planet Mercury is revolving in an elliptical orbit around the sun as shown in the given figure. The kinetic energy of mercury is greatest at the point labelled
A
A
B
B
C
C
D
D
Correct Answer: Option A
Explanation
1. The planet Mercury revolves around the sun in an elliptical orbit, governed by Kepler's laws and conservation of energy.
2. Kinetic energy (KE) is given by 1/2 * mv^2, where m is mass and v is velocity.
3. According to Kepler's second law, a planet moves fastest when it is closest to the sun (perihelion) and slowest when it is farthest (aphelion).
4. In the given figure, point A represents the perihelion, the point closest to the sun.
5. Therefore, Mercury's velocity is greatest at point A, and consequently, its kinetic energy is greatest at point A.
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