What is a Machine?

Machine ProductOutputObjectInput

Materials

What is a Machine?

TVSound

OutputObjectInput

Electricity

Example - TV

Signal

Picture

What is a Machine?

Simple Machine Force

OutputObjectInput

Simple Machine

Force

ForcesWhat is a Force?

Push or Pull

What does it do?

Causes Motion

How do we describe it? Size (magnitude) Direction

Why do we use simple machines?

• To make life easier!

• Simple Machines change forces:

change the direction

change the size

change both

What are the 6 simple machines?

• Inclined Plane

Wedge

Screw

• Lever

• Wheel and Axle

Pulley

How do simple machines work?

Conserve Energy

Applied Resultant Force x Distance = Force x Distance

force x Distance = Force x Distance

Incline Plane

Change Force Direction

Change Force Size

Wedge

Change Force Direction

Change Force Size

Screw

Change Force Direction

Change Force Size

Lever

Change Force Direction

Change Force Size

Resulting Force X Distance = Applied Force X Distance

Wheel and Axle

Same Direction

Change Force SizeResultant Force X Wheel Radius = Applied Force X Axle Radius

Gears

Change Force Direction

Change Force Size

Pulley

Change Force Direction

Same Force Size

Scavenger Hunt

Find the Simple Machines

In Your Classroom

Hubble!