Final design of my Rube Goldberg machine (aka balloon popper):
Is to pop a balloon without having to touch it.
Description of each step:
A: Step a uses thermal energy. bellow the ramp there is a candle which will be used to melt the ice cube that the ball is being blocked by. The flame is also stored as chemical energy while it is lit.
B: Step b is after the ice melts the ball will drop down the ramp and use mechanical energy (ball rolling/ movement of an object from one place to another). It also uses gravitational energy because gravity is what allows the ball to drop down the ramp.
C: Step c uses sound energy. Once the ball has dropped down the ramp it then hits a bell which triggers a sound.
D: Step d is after the ball hits the bell it then hits a domino causing them all to fall down by using thrust energy (thrust is a force or a push).
E: Step e occurs because the last domino has thumbtacks on it which pushes the balloon into a box with nails attached which creates it to pop turning potential energy to kenetic.
Forms of energy:
thermal energy/ kinetic chemical/ potential gravitational/ potential mechanical/ kinetic sound/ kinetic thrust/ kinetic
A to B: Chemical energy to thermal to gravitional/ mechanical
B to C: gravitational to sound
C to D: sound to thrust
D to E: balloon potential to kenetic once popped
Three forms of simple machines:
Inclined plane– the ramp the ball falls down is a inclined plane. Lever– dominoes are a lever because levers are activated when something comes upon contact with another object. wedge– a thumbtack’s point is a wedge that splits open the balloon.
Video with description:
Core Competency self-assessment: