Question

Figure shows the variations of energy E with the orbit radius of a satellite in a circular motion. Choose the correct statement.

• A. A shows the kinetic energy , B shows the total energy and C the potential energy of the satellite.
• B. A and B are kinetic energy and potential energy respectively and C the total energy of the satellite.
• C. A and B are the potential energy and kinetic energy respectively and C the total energy of the satellite.
• D. C and A are the kinetic and potential energies and B the total energy of the satellite.

Answer 1

Answer: (B)

A and B are kinetic energy and potential energy respectively and C the total energy of the satellite.

Answer 2

Kinetic energy of the satellite, $\mathrm { K } = \frac { \mathrm { GMm } } { 2 \mathrm { r } }$

Potential energy o the satellite,

Total energy of the satellite,

In figure,

Variations of K with r is shown by curve A.

Variation of U with r is shown by curve B.

Variation of E with r is shown by curve C