Abstract:

Starting from a grand plan of a domestic sci-fi blockbuster “The Wandering Earth”，the minimum mechanical work needed to stop the Earth rotating is deduced and calculated by using the law of conservation of momentum moment，the theorem of kinetic energy and the concept of the first cosmic velocity. The result is about 4.1×1030 J.The problem of feasibility of stopping the Earth rotating is discussed from the viewpoint of energy.

Key words: the wandering Earth, earth rotating, law of conservation of momentum moment, energy')">theorem of kinetic energy, the first cosmic velocity