In our Energy Transfer Machine, we put together multiple steps to complete the final project, turning on the bedroom light.
The project starts with a tennis ball being rolled down a PVC pipe, and onto a plank of wood which knocks down the dominoes and hits a string which pulls down a second plank of wood. The wood lets loose a spinning exercise equipment piece, knocking down a tennis ball that rolls down the ramp ahead. It kicks over a ruler, which pulls up the cardboard covering the 9-volt battery powered car. The car rolls down the ramp and knocks the can of food into a bucket tied to the light switch, and turns on the light.
For materials, we gathered dominoes, tape, a 9volt battery (water bottle, fan, wheels), wood, paper, wire, basket, tennis ball, and PVC pipe. We built the car with a kit off of Amazon, attaching the wheels, fan, and battery onto the plastic water bottle.
-Trinity (grade 9)
-Luisfelipe (grade 9)