"Think" - Today we were given a model pendulum to build. The original design as shown in the picture behind slid when used, and the wheel wasn't strong enough to knock down anything. We (me and Nate) thought that getting a larger, more stable base would help; We also thought it would need more momentum.
"Do" - After deciding on how we were going to add the base, we worked together to add larger bases and a rubber brake. Even after that it still wasn't strong enough to take down the blocks, so we increased the length of the pillars and the arm so it would have more momentum.
"Test" - Our final form of the pendulum was a complete success, without fault and knocked down the blocks every time. The only reason why this was possible is because of the stable base and the longer arm that we added to the machine.
Criteria - We must create a pulley system / elevator that can lift / transport 3 blocks 3 inches high
"Think" - We want to make a crane-like system with a pulleys and a crank in the back to lift up a elevator in the front carrying the 3 blocks. The string will pull from the crank over the two pillars and to the box. The end pillar is a 2 by 20 piece so it'll lift it higher than it needs to.
"Do" - We built a base with 3 pairs of arms to carry the rope. We also built an elevator that securely carries the 3 boxes. We built the crank, but it was a complete bust. After we built the whole thing the only problem we had was the crank. We had to modify it several times until we were satisfied.
"Test" - After the mods to the crank were done, everything ran well. The elevator worked in the end and the test was a success.
"Think" - We need to finish up our work for challenge 2, taking a video. We're taking a video in spark video to put it in our page. The only difference with this video is that we have a ruler in it to measure how high the blocks.
Criteria - Make a lever system capable of catapulting a designated object at least 1 foot.
"Think" - It needs a long arm and a tall pillar to launch it far enough. We are thinking of putting 2 20 by 2s for the long end of the arm and another beam connected. At the end of that we'll add a crate to hold the object. At the other end of the arm we'll add a shorter arm piece with a tire at the end. It'll all be swinging on a pivot with a base.
"Do" - We made the prototype, and it was a bust. We couldn't launch it without having it fa ll over. We flipped it upside down and it actually stayed stable and it almost got far enough. So we added a few modifications to the arm and it worked without fault.
"Test"- Our 3rd design worked perfectly. It launched the block over a foot and it met all critera. This lever system was a big success!