Don’t Let Granny Break A Nail! A Rube Goldberg device that opens a tea box.

Team Members  Garrett Evans  Carlisha Simpson  Michael Deiderich  Brittany Caldwell

The Machine  This machine is designed to open a tea jar with a paint can lid.

First Step  A compressed spring is released, changing energy from potential energy of a spring into kinetic energy of a ball.

Second Step  As the ball rolls up a ramp, its kinetic energy is changed into gravitational potential energy

Third Step  When the ball’s velocity changes from positive to negative, the potential energy is converted into kinetic energy

Fourth Step  The ball rolls into a cup which drops. The force of the ball and cup then pushes a string.

Fifth Step  The string moving pulls a support from underneath an arm, which makes the arm drop. This step converts potential energy into kinetic energy.

Sixth Step  The falling arm hits the screw driver which acts as a lever opening the tea can

Eureka!  The tea jar is open!

Conclusion  The jar top is popped open from energy changing in six steps.  Any Questions?  Thank you