If all people, animals, trains and trucks all over the world began to walk or run towards the east, then the

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When all people, animals, trains, and trucks move eastward, they exert a westward force on the Earth due to Newton's third law (for every action, there is an equal and opposite reaction). This action would cause the Earth to spin a bit slower, not faster, as it conserves angular momentum.

If All People, Animals, Trains and Trucks All Over the World