The simple machine used to lift heavy objects is called a "lever." A lever consists of a rigid beam positioned about a pivot point, known as the fulcrum. By applying a force at one end of the lever, the lever allows the user to lift a heavier load at the other end with less effort. The mechanical advantage gained through the use of a lever makes it easier to move heavy weights, demonstrating fundamental principles of physics and mechanics. Levers are widely used in various applications, from simple tools like seesaws to complex machinery in construction and manufacturing.