The figure shows the variation of energy with the orbit radius of a body in circular planetary motion. Find the correct statement about the curves A, B and C
A
A shows the kinetic energy, B the total energy and C the potential energy of the system.
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B
C shows the total energy, B the kinetic energy and A the potential energy of the system.
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C
C and A are kinetic and potential energies respectively and B is the total energy of the system.
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D
A and B are kinetic and potential energies and C is the total energy of the system.
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Solution
The correct option is D A and B are kinetic and potential energies and C is the total energy of the system. The body is in circular planetary motion this implies that Potential energy will be negative (attractive) and the total energy of the system will lie between zero and potential energy (because of circular motion). Therefore, the correct choice is D.