The materials I used in my project were two wooden meter sticks, tape, five neodymium rare earth magnets (cube in shape 1 ½ cm x 1 ½ cm), eleven nickel plated steel bell bearings around the same height as the magnets or larger, a sharp pair of scissors, and a wooden board. The procedures I took were to attach the five magnets to the wooden rulers with the tape about twelve centimeters apart from each other. Tape the rulers so the magnets do not become attracted to themselves easily. To the right of each magnet, I placed two steel ball bearings. I fired the device by setting the eleventh ball bearing in front of the leftmost magnet and the energy would pass through the magnets launching the ball at a very high speed, so fast your eyes cant even see it.
When angled in an uppward position the speed gradually decreased because the force of gravity was acting against it. When angled in a downward position the speed increased gradually as the force of gravity added on to the acceleration form the device. Since I used two sizes of ball bearings the speed also changed when I changed the sizes or combined them.
In conclusion I found that when angling the device in an upward position the device went slower because of the force of gravity which I did not take into consideration was going to act against it. I also found that when you angle the device in a downward position the force of gravity acts with the decice which makes the device go faster. When using the larger sizes balls the device goes slower because of the mass. When using the smaller balls the device goes faster and is because of less mass.
This project is simply a device that launches steel ball bearings at very high speeds with neodymium magnets.
Science Fair Project done By Ernesto Botello