Rube Goldberg #4

On Tuesday, February 26, my partner and I started building our Rube Goldberg. Our simple machines are the inclined plane, the lever, and the wheel and axle. We started with our beginning, which is a lot of paper towel rolls and toilet paper rolls taped together, to make the marble roll down the stairs. My partner and I decided to put a chair in the back of the tube, so the tube would be higher, and the marble will have more power. We tried to tape the tube onto the chair but it wouldn’t stick. Then, we tried to tie the tube to the chair, and it worked. Then, we started building the rest. The ball was supposed to knock down a tall box. We dropped the ball in the tube and the ball went into a different direction. We tried again, but the ball still went in a different direction, and not straight into the box. We haven’t found a way to fix this yet, but we are really excited to see the whole Rube Goldberg built.