The Moon is seen to keep one face toward Earth at all times. If viewed from a point directly above the plane of the planetary system, how does it have to rotate to maintain this alignment?

It must rotate once in approximately 27 days (once per month), or once per orbit around the Earth

Explanation:

The moon has only one of its sides facing the earth always. To keep up with this, it must travel round the earth in an orbit that takes approximately 27days

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.