Question

The figure-$3.71 $ 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.
• B. $C$ shows the total energy, $B$ the kinetic energy and $A$ the potential energy of the system.
• C. $C$ and $A$ are kinetic and potential energies respectively and $B$ is the total energy of the system.
• D. $A$ and $B$ are kinetic and potential energies and $C$ is the total energy of the system.

Answer 1

Answer: (D)

For a planetary motion of body being a bounded motion its total energy and potential energy must be negative with respect to zero energy at infinite separation from the center of force. So among the given option (D) is correct.