Simple Machines Gillis Sci 421

What is a Machine? Machine Product Materials Object Output Input

What is a Machine? Example - TV Electricity Picture TV Sound Signal Object Output Input

What is a Machine? Simple Machine Force Force Object Output Input

Forces How do we describe it? Size (magnitude) Direction What 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 Size Resultant 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

SRB’s Are Recovered after Splashdown

http://images.jsc.nasa.gov/images/pao/GT10/10074433.htm JSC Digital Image Collection Press Release Images NASA Photo ID: S66-42762 File Name: 10074433.jpg Film Type: 120 b&w Date Taken: 07/18/66 Title: Time exposure of Gemini 10 launch. Description: The Gemini 10 spacecraft is launched from Complex 19 at 5:20 p.m., July 18, 1966. A time exposure creates the illusion of multiple rocker arms. Onboard are astronauts John W. Young and Michael Collins, command pilot and pilot, respectively. Subject terms: GEMINI 10 FLIGHT GEMINI PROJECT

Hubble! http://grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001066.html GRIN NASA Center: Johnson Space Center Image # : STS082-709-097 Date : 02/19/1997 Hubble Redeployment Full Description Attached to the "robot arm" the Hubble Space Telescope is unberthed and lifted up into the sunlight during this the second servicing mission designated HST SM-02. Keywords STS-82 Discovery Payload Bay Hubble Space Telescope HST Remote Manipulator System RMS Canada Arm Subject Category Space Shuttle, Hubble, Reference Numbers Center: JSC Center Number: STS082-709-097 GRIN DataBase Number: GPN-2000-001066