However, finding certain Pokemon, especially those that are outside of the first generation can be difficult. If looking to make several of these crafts PVC Pokemon figures can be found relatively cheap in bulk for less than 20 cents a piece. These can usually be found sold in packs of ten for around a dollar a piece depending on the size.Īlso, decide which Pokemon figure will be needed. Pokeball Terrariums are fun little models that imagine what life is like inside of a Pokeball for a given Pokemon! To craft them, start off with a clear fillable ornament ball.
#Pester ball how to#
KE ball : 0.Pokeball Terrariums are fun little models that imagine what life is like inside of a Pokeball for a given Pokemon! Here’s how to craft them. PE spring : 9 J How much energy stored inside the spring before firing K (spring constant): 125 N/m The amount of force exerted per 1 meter on the spring V total : 14.91 m/s, or 33.35 mph The total velocity of the ballĪngle of Launch: 18.12° The angle of the ball leaving the arm V vert : 4.65 m/s, or 10.4 The velocity of the ball vertically V horiz : 14.21 m/s, or 31.79 mph The velocity of the ball horizontally. T in air : 1.9 s The time the ball was in the air String Length : The string on the ball had to be changed to 40cm (or 20cm once you fold it in half.) This might be because the shorter the string, the less resistance is has, but the longer the string, the more distance is traveled, thus resulting in more velocity.ĭ horiz : 27 m, or 88.5 ft How far the ball had traveled horizontally.ĭ vert : 4.42 m, or 14.5 ft Height of the ball at it’s highest point. This is probably because the nail doesn’t hold on to the string very well, so the string slides off at the last second, with little resistance. Nail Angle : Our original nail had an angle that we didn’t know, but we switch it to 10° away from the counterweight, because our experiments showed that angle doing the best. This is probably because the stopper reduced the distance the arm traveled, but made the inertia of the ball still go the same distance as the arm going a longer distance without a sudden stop. We replaced both the rubber bands and mass with the metal spring, because it had the highest potential energy, transferring into more kinetic energy.Īrm Stopper : We originally had a piece of wood to stop the arm from spinning around, but an experient found that the stopper didn’t affect the distance of the ball very much. The smaller ball is big enough to not be affected by air resistance as much, but small enough so inertia won’t affect it as much either.Ĭounterweight : Three different counterweight were tested: a metal spring, a 1kg mass, and two rubber bands. This is because the arm travels a greater distance in the same amount of time, having more velocity on the ball as it gets released.Ĭlay Ball : Our clay ball was larger than the seven gram ball that worked the best in our experiments, so we made ours seven grams and it worked a lot better. These trebuchets were made mainly out of wood, with screws as connectors and nails to hold the ball and counterweight.Īxle Holder : The boards we had originally were shorter, so we increased their height slightly, because in our experiments, the higher the axle was, the farther the clay ball had gone. The goal of this project to create a trebuchet to fire a ball of clay the farthest while using limited materials and having no length be longer than one meter.
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