Over the past semester everyone in year 5 has been building Rube Goldberg Machines. A Rube Goldberg Machine is a very complicated contraption to complete a simple task, like turning on a light or cooking toast ours flicked a lolly into your hand. Building our Rube Goldberg Machines took lots of time and hard work so today we had a chance to show them off. When we showed off our machine we explained who Rube Goldberg was and how our machine worked and then tried it out, our machine only worked once but luckily lots of people were watching. The restrictions to building our machines were, it had to have a number of simple machines and elements equal to the number of people in the group and it had to be confined in the size of one large box. Our group had four people so that meant four elements and four simple machines. Our simple machines were, two inclined planes, three levers, a wedge and a fulcrum. From building our Rube Goldberg Machines I learnt that if something doesn’t work the first time you should keep on trying.
In design on Friday we worked on our Rube Goldberg machines. In our machines we had to have the number of elements and simple machines equal to the number of people in the group. Our group was almost done building but unfortunately we didn’t have enough simple machines so we had to completely restart. We all went back to our table and thought up a whole new design, this time with enough simple machines. Our design now has a pulley, inclined plane, fulcrum and a lever. The fulcrum and lever make up a see saw and the inclined plane makes a ramp. So far we have built the first element, a ramp leading to a see saw. Next session we will try to get the see saw to work and build the next element, which is a track leading to a pencil that releases a wind up car.
On the weekend Sam and his brother Mitch came over. We all played darts. Sam won most of the rounds even though we had two darts each. We also built a Rube Goldberg machine. It was very hard but after many tries it finally worked. It was so cool to watch it finally work.