By: Natalie Browning Scott Burnette Kyle Holtsclaw Heather McMahan The Marble Machine By: Natalie Browning Scott Burnette Kyle Holtsclaw Heather McMahan

Overview Made of PVC pipe and one piece of foam Held together with tape and hot glue Relies on gravitational potential energy to get started Marble rolls through a series of pipes and stops after dropping through the last pipe Average run time is 15.3 seconds

Materials/Cost PVC pipe…………..……………………$5.00 Wooden base……………………….…$2.00 Tape and hot glue……………..….…$3.00 1 marble…………………………………..$0.10 Foam………………………………………..$1.00 TOTAL……………………………………….$11.10

Stored Energy Marble is dropped at the top of the roller coaster. Initial energy=gravitational potential energy Converted to kinetic energy

Conclusions Design Complications: 1. Placing the different PVC pipes at the right angles 2. The marble falling off the edges 3. The roller coaster not lasting 15 seconds We spent the most time figuring out how slowly the marble could roll without actually stopping and at which angles the pipes had to be positioned.