Which one of the following is NOT an example of the conservation of angular momentum?
A) A figure skater spins faster as she brings her arms in close to her body.
B) Earth moves faster in its orbit at those times of the year when it is closer to the Sun (Kepler's second law).
C) The particles in the nebula around a protostar move faster in their orbits as the nebula collapses inward.
D) The Moon always keeps one face pointed toward Earth.

Question

Quizplus · Accepted Answer

The Moon keeping one face pointed toward Earth is an example of tidal locking, not a demonstration of the conservation of angular momentum. The other options (A, B, C) illustrate situations where angular momentum is conserved, leading to changes in rotational speed or orbital velocity as the distribution of mass changes or as objects move in their orbits.

Which One of the Following Is NOT an Example of the Conservation