ou are going to build your own Rube Goldberg machine. You will start with the plan you made last time but you must add at least two other kinds of simple machines. You may use more but there needs to be at least three in your design. The purpose of the machine can be whatever you like. After you make your plan, create a design. A prototype is optional. Next build the machine. Once you have built the final machine, test it to see if you need to make adjustments or improvements. Write all your observations, steps, and test results to submit as your portfolio.......

Plan:

1. Start with a marble rolling down a ramp, hitting a domino, which will knock over a series of dominos.
2. The last domino in the series will hit a lever, which will release a ball down a funnel.
3. The ball will roll down a series of inclined planes, knocking over another set of dominos.
4. The dominos will hit a pulley system, lifting a weight.
5. The weight will pull a string, releasing a toy car down a track.
6. The car will crash into a wall, knocking over a cup of water.

Design:
I will use a variety of materials such as wood, dominos, marbles, pulleys, strings, toy cars, and a cup of water to build my Rube Goldberg machine.

Prototype:
I will create a small-scale prototype using cardboard, popsicle sticks, and other household materials to test the feasibility of my design and make any necessary adjustments.

Final Build:
I will gather all the necessary materials and tools to build the final Rube Goldberg machine according to my plan and design. I will carefully assemble each component and test each step to ensure smooth operation.

Testing:
After building the final Rube Goldberg machine, I will test each step to see if any adjustments or improvements are needed. I will document my observations, steps taken, and test results to submit as my portfolio.