Functions of the Simple Machines Simple machines have

Functions of the Simple Machines • Simple machines have three main functions: They transmit forces. They change the direction of a force. They modify the intensity (size) of a force.

5 Different Simple Machines • Lever (3 types) • The inclined plane (required force relates to slope) • The pulley (different types) • The Wedge • The Wheel and axel

Levers • Levers: These simple machines pivot around a FULCRUM. For a lever, there is always a fulcrum, a load, and a force. The type of lever depends on the positioning of these things.

First Class lever: see -saw Second class lever: wheelbarrow Third class lever: baseball bat

Inclined Plane • The slope of an inclined plane reduces the force required to lift an object. The greater the distance covered, the lesser the force required to move an object.

The Pulley Include a wheel and cord. They can change the direction of the force. Some can reduce the force required to lift something.

Wedges Allow us to pry objects apart.

Wheel and Axle

Simple Machines • In general, simple machines are designed to make life easier. Less work is required when we use simple machines. Work = force applied x distance

Simple Machines Create a page size table. Add to your chart as we watch this video and refer to pages 412 -417 in your text book. Simple Machine The Level The Inclined Plane The Pulley The wedge The wheel and axle Characteristics/Fun ction