A pulley system works by redirecting the force applied to lift an object. When a pulley is used, the force needed to lift the object is distributed between multiple ropes and pulleys, reducing the amount of force required by the person lifting the object. This makes it easier to lift heavier objects as the force required is divided among the multiple ropes and pulleys in the system. Additionally, pulleys allow for the direction of force to be changed, making it easier to lift objects vertically or horizontally depending on the configuration of the pulleys.
