Forces What is a Force? Push or Pull What does it do? Causes Motion How do we describe it? Size (magnitude) Direction.

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Presentation transcript:

Forces What is a Force? Push or Pull What does it do? Causes Motion How do we describe it? Size (magnitude) Direction

What are the 7 simple machines? Lever Inclined Plane Wedge Screw Wheel and Axle Gear Pulley

Why do we use simple machines? To make life easier! Simple Machines change forces: change the direction change the size change both

How do they work? Conservation of Energy Work and Energy are related Scientific Definition of Work Work = Force x Distance distance in direction of force

Lever

Incline Plane

Wedge

Screw

Wheel and Axle

Gears

Pulley Change Force Direction Same Force Size

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