A simple machine is a device that helps make work easier; a device that makes it easier to move something. Some simple machines are a wheel, a pulley, a lever, a screw, and an inclined plane. Most machines consist of a number of elements, such as gears and ball bearings, that work together in a complex way. No matter how complex a machine, it is still based on the compounding of six types of simple machines. The six types of machines are the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw.
–A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.
-A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads.
–A wheel with a rod, called an axle, through its center lifts or moves loads.
-A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.
-Finally, do the following activities. You’ll find them very interesting!