Why is it more difficult to revolve a stone by tying it to a long string than by tying it to a shorter string?

Revolving a stone tied to a long string is more difficult than with a shorter string due to the increased moment of inertia. A longer string allows the stone to travel a larger circular path, requiring more force to maintain the same angular velocity. Additionally, the longer distance increases the tension in the string, which can make it harder to control the stone's motion. The centripetal force needed to keep the stone in circular motion also increases with the radius, adding to the difficulty.