My Simple Machines

BY: La'Trecia Harris

Lever

Lever, a simple machine with a bar that rotates about a fixed point, called a fulcrum. Levers are needed to do a certain amounts of work, and are used to lift heavy objects. A lever is used to open a door, to brake objects apart, and even to move heavy objects. Great examples of a lever are listed below.
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Pulley

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 simple machine with of a wheel (similar lever) that turns an axle around which a cord is wound. Most known to increase to speed of work. If using a door knob; the knob is it wheel and the rob connecting the knob to the door is of course, the axle.
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Screw

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.

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Wedge

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.

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Inclined 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.

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