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The contraption that will open your cellular
device
Oh yea, thats Patrick
Robby
Alan
Amanda
Krista
Final Team Project, EF 151
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Project Description

• A device in which, through a series of energy
  conversions, allows someone to answer their cell
  phone hands free.
• A funnel fills a bottle with water
• Weight of water pulls down the bottle, which
  pulls down a string that is attached to the
  bottle
• Force from the string that is on a pulley causes
  the string to lift a board and produce an incline
• Ball rolls down a path onto a mousetrap
• Weight of ball causes mousetrap to go off
• String is tied onto mousetrap that is
• attached to top portion of the cell
• phone
• Force of mousetrap springs force
• on mousetrap bar pulls string
• Tension force of string causes cell
• phone to open

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Energy Conversions
Water is poured into the funnel
KE of the bottle moving downward equals KE of
board moving upward.
KE of the board moving causes the balls velocity
to start rolling down the ramp, plus the ELOSS of
the friction of the ball rolling.
Balls weight equals necessary force able to set
off mousetrap. Trigger of trap releases the force
in compressed string. String attached to the
spring of trap exerts same force of released
spring. Force on string equals amount of energy
required to open cell phone. ELOSS obtained
through device does not compare to amount of
excess energy produced.
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Lets See How It Works
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Watch out for the Mousetrap!
Robby wasnt quick enough..
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Conclusion

• Though our device could have been made more
  energy efficient by using a different combination
  of materials, it worked well in achieving our
  anticipated outcome. The device endured a series
  of changes due to previous idea failures before
  we were successful. Each team member equally
  contributed and was open-minded to everyones
  ideas. We were able to apply many of the concepts
  we learned this semester, and in addition were
  able to demonstrate teamwork, innovation,
  technical skills, and communication skills.

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Individual Contributions
Construction, Materials, testing of mousetrap
Construction, Powerpoint, Uploading of files
Construction, Report
Revisions, Final Preparations