My Simple Machines
BY: La'Trecia Harris
A pulley is a wheel on an ax or that is designed to support movement and change of direction of a cable or belt along its circumference. The well-known use for pulleys was to make it easier to lift heavy items, which are often found on wells (to gather water), gyms (to lift weights), and even construction cites.
Wheel And Ax
A screw is an inclined plane wrapped around a pole which holds things together or lifts materials. A screw can work by turning the screw into an object or flat surface. Screw are often used to fix objects or connects together.
A wedge is a simple machine made up of two inclined planes put together, which meet and form a sharp edge. Wedges are used to push two objects apart, or cut an object into pieces and holds objects in plane.
An inclined plane is a flat, sloping surface. Inclined planes are used to make the job of moving heavy object easier. An object can go up an inclined plane or down. Objects usually move straight up and down. This takes the most work and is harder if objects are heavy. With an inclined plane, the slope makes it easier to push or pull the object.