1. Emily, Jade, Clara, and Tilly built a Rube Goldberg machine using a cardboard tube, dominoes, a toy train, matchbox car, crochet ball, wooden wedge, and hole puncher to punch a piece of paper. 2. They went through several design changes before settling on using the hole puncher, and encountered problems like levers not working properly that they had to solve. 3. They incorporated four simple machines - an inclined plane, wedge, lever, and wheel and axle. The machine worked on their second try and they learned that perseverance leads to success.

1. Rube Goldberg
Refection
BY EMILY FRY 5B
Group: Jade, Clara and Tilly
Project: Making a hole-puncher punch a piece of paper.

2. Materials we used
 To make the Rube Goldberg machine, we obviously need materials. So we
collected up A cardboard tube, domino bridge, toy train, toy matchbox car,
crochet ball, wooden wedge, dominoes and of course a hole-puncher.
 For the weight, to push the wedge, we were thinking about using a bag of ball
bearings, but that didn’t work properly, so we used the crochet ball.
 Before all this, we were going to use hex-bug tracks and train tracks, but we
ended up giving up on that idea.
Our Crochet ball
Our domino
bridge, train
and tube

3. Planning
 When we were planning, we were thinking about having our rube Goldberg
present a marble in a cup. But after a while we ditched the idea because it
was to basic.
 Then our next idea was to make it charge a computer but then that got too
hard and we had to change that.
 In the end we had the idea of making it hole-puncher a piece of paper
because that was most adaptable with the equipment we had and it seemed
more interesting.
 Clara helped us with the design because she went into her own time to make
the plan up at home.

4. Simple Machines
When we were building we noticed that we didn’t have enough simple machines.
We had to have 4 simple machines. We only had a pulley. But in the end we
ditched the pulley idea and these are the simple machines that we made
Inclined plane
Wedge
Fulcrum Lever
Wheel and axel
Our wedge ---
---Our lever and inclined plane

5. Problems & Solutions
 Over the past few weeks we have had some problems, like the lever that we
had at the start wasn’t the right height, the triangle for the wedge went
missing, but we created a new one and it surprisingly worked better.
 Another problem was when we had to have a 4th simple machine, which we
chose a lever. But that lever wasn’t working properly it kept on getting caught
on the cardboard.
 When the car didn’t move across the platform and we had to change the
platform to an inclined plain which worked well because it added another
simple machine to our list

6. What I have learnt
 I have learnt during this process that not everything goes right the first time
and heaps of tries always make it right not just 1 or 2.
 You get more excited about when something works with heaps of tries rather
than just 1.
 Simple machines help tasks a lot and without them you may have trouble.

7. The making of the film
 When we were filming, on our second try, it was a success!
 When we were filming what we learnt, we had a few fails and had to keep on
changing our speech because we thought it needed more.
 Also when we were filming, we spoke to fast and you couldn’t really hear it
on the camera because we spoke too quietly.