Q8
Question
The diagram shows the perigee and apogee of the Moon—two points in the Moon’s elliptical orbit around Earth.
Which of the following statements is correct?
(A) When the Moon reaches the apogee, its gravitational potential energy as well as its kinetic energy will be at minimum. It will move at a low velocity.
(B) When the Moon reaches the apogee, its gravitational potential energy as well as its kinetic energy will be at maximum. It will move at a high velocity.
(C) When the Moon reaches the perigee, its gravitational potential energy will be at a minimum and its kinetic energy will be at a maximum. It will move at a high velocity.
(D) When the Moon reaches the perigee, its gravitational potential energy will be at a maximum and its kinetic energy will be at a minimum. It will move at a low velocity.

Syllabus alignment
- Motion in Gravitational FieldsApply Kepler's laws, gravitational potential and total orbital energy, escape velocity and energy changes between orbits.
- Motion in Gravitational FieldsPredict orbital speed, period, radius and acceleration for planets and satellites, including geostationary orbits.