To move a 70 kg person without motors in a 50-meter circumference circle, various methods can be employed. Options include using wheeled devices like bicycles, roller skates, or carts, which can be propelled by human power. For water movement, boats with paddles or oars are suggested, while in the air, kites or human-powered propeller systems could be utilized. The discussion emphasizes creativity in finding solutions, considering factors like terrain and available resources. Overall, the focus is on leveraging human power and mechanical principles to achieve movement.