Mobile%20Project

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Mobile Project

• Cherie Lehman
• WLHS

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Mobile Project

• Mobiles Inspired by Work of Alexander Caulder
• Mobiles -- Blend of Physics and Art
• Mobile Construction -- Torque Assessment

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Alexander Calder

• Received a degree in mechanical engineering but
  soon after decided to pursue a career as an
  artist.

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Caulder Examples
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1957 NY Port Authority
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Constellation Tower
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Mobile Supported by Stabile
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Authentic Assessment

• Students apply the concepts learned in the unit
• Torque
• Balance
• Center of Mass
• Pivot

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Project Details

• Project counts as an exam
• Design plan must accompany mobile
• Diagram of mobile showing locations of weights
  for each tier
• Torque calculations for each tier
• Mobile itself

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Mobile Requirements

• Your mobile should have a theme
• For example, a mobile with an astronomical theme
  would contain stars, planets, comets, etc.
• Each mobile must contain 5 tiers
• At least 1 tier must contain 3 masses
• At least 2 tiers must be pivoted from a point
  other than the cg of the support rod
• You must include a layout of the mobile design

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Design Layout for Each Tier

• the mass of the support rod
• the masses of the hanging ornaments
• the lengths of the respective lever arms
• the location of the pivot
• Mathematical proof that the torques are balanced

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Design Plan

• If the mass of your support rod is significant
  compared to the masses of your hanging ornaments,
  be sure to include the torque exerted by the
  weight of the support rod in your calculations.

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Mobile Grading Scheme

• 25 pts. for your design plan
• 25 pts. for the 5 tiers -- 5 pts. for each tier
• 5 pts. for one tier containing 3 masses
• 10 pts. for two tiers pivoted at point other than
  cg of support rod
• 10 pts. for proper balance -- i.e. horizontal
  orientation of supports

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Grading Scheme Continued

• 10 pts. for theme
• 15 pts. for artistic design and aesthetic value
• BONUS 5 pts. bonus for science theme
• BONUS 5 pts. bonus for extra tier
• 100 pts. total

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Toys in the Attic
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Stars Mobile
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Life Cycle of a Star
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Molecules
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Evolution of Music
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Sports
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Scientists
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Toys
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Calculating Torques
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Final Adjustments
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The Food Chain
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Geology Mobile