Simple Machines

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A simple machine is a basic tool that helps us do work more easily by changing the direction or amount of force needed. Examples include levers, pulleys, and inclined planes.

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We use simple machines to reduce the effort needed to do work. For example, lifting a heavy rock is easier with a lever than by hand.

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The six types of simple machines are: Lever, Inclined Plane, Screw, Wedge, Wheel and Axle, and Pulley.

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A lever is a simple machine made of a rod or bar that turns around a fixed point called a fulcrum. It helps lift heavy loads with less effort.

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The three parts of a lever are: Fulcrum (fixed support), Load (object being moved), and Effort (force applied).

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A lever makes work easier. For example, a seesaw uses a lever to lift a person up with less effort by balancing the load and effort around the fulcrum.

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In a Class 1 lever, the fulcrum is between the load and the effort. Example: A seesaw or a pair of scissors.

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In a Class 2 lever, the load is between the fulcrum and the effort. Example: A wheelbarrow or a bottle opener.