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Physics
A planet is revolving round the sun in an elliptical orbit. Of the following, the property which is a constant during the motion of the planet is :
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Q. A planet is revolving round the sun in an elliptical orbit. Of the following, the property which is a constant during the motion of the planet is :
Gravitation
A
The force of attraction between the planet and sun.
B
The total energy of the "planet plus sun" system.
C
The linear momentum of the planet.
D
The kinetic energy of the planet about the sun.
Solution:
Total energy and angular momentum of a planet+sun system remain conserved hence option (B) is correct.