Transcript “The contraption that will open your cellular device”

“The contraption that will open your
cellular device”
Oh yea, that’s Patrick
Robby
Alan
Amanda
Krista
Final Team Project, EF 151
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 spring’s force
on mousetrap bar pulls string
• Tension force of string causes cell
phone to open
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 ball’s velocity to start
rolling down the ramp, plus the ELOSS of the friction of
the ball rolling.
Ball’s 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.
Let’s See How It Works…
Watch out for the
Mousetrap!
Robby wasn’t quick enough…..
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 everyone’s
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.
Individual Contributions
Construction, Materials, testing of
mousetrap
Construction, Powerpoint, Uploading
of files
Construction, Report
Revisions, Final Preparations