Rube Goldberg Nikki, Brooke, Anna, and Henry

What does our machine do?The task that our very complicated machine is set up to

complete is the turning on of a flash light. Where did we come up with the design?

There was really no specific source of inspiration for our machine. We used all the ideas from our group members and made it into one collaborative machine. How does our machine work?

The main source in the functioning of our machine is the transfer of energy from one step to another. We also use some forces of gravity to our advantage at the very end with the turning on of the flash light.

We would also like to thank Mr. Reil for helping us do the power tool work. We would also like thank him for assisting us in the functioning of the wheel and axle.

First Reaction1) Our machine starts out

with a weight being dropped into a cup.

2) The weights will then set off the pulley sending the cup with the weights down towards the screw platform.

MA of pulley 1*2 support strings but one is pulling down so MA=1

3) The cup will hit the platform setting off the bead down the

screw.

Second Reaction

Begins

Second Reaction Continued

4) The weighted bead at the top will start down the screw after it is triggered by the cup.

MA of screw= 2* Pitch =5in Circumference =10in

* MA= Circumference/pitch

Third Reaction Begins

5) The weighted bead, after going down the screw, will hit the car.

6) The car will then be sent down the track as it heads towards the dominos.

MA of inclined plane (track)= 4.4

*l= 24in h=5.5 in*MA= l/h

7) The car will be slowed by a stopper made of poster putty but it’s energy will be transferred and knock

over the first domino.

Fourth Reaction Begins

8) The line of dominos fall and transfer their

energy from one domino to the next

9) The dominos will hit the wheel.

MA of domino= 0.9* 3rd class lever

*lr=4cm le=3.5cm

MA of wheel and axle= 57.9* Wheel radius=12.17cm

* Axle radius=.21cm* MA= Wheel r/Axle r

Fifth Reaction Begins

10) Wheel will turn and hit the ball perched at the top of the inclined tube.

11) Ball will roll down tube and onto table.

MA of inclined plane (tube)= 2.75*l=5.5in h=2in* MA=l/h

Sixth Reaction Begins

12) After ball has rolled out onto table it will hit the weight.

13) Weight will fall and start the pulley in motion

MA of pulley 2= 1* There are two support strings but

one is pulling down.

14) The force exerted from the dropped weight transfers through the pulley and finally our task is complete the force pulls the string and turns on the flash light.