ELKAR

Gliders by: KiAr, RaAr and ErLe Problem: How do changes in one characteristic affect the distance it flies? Hypothesis: if we put more weight on the back it will fly farther. Materials: Straw, Paper, Tape, Scissors, ruler, tape measurer, pincel. Control variables: 1.  How hard you throw it. 2.W  ho throws it. 3.T  he front wing has to be three by eight. 4.T he back wing has to be three by twelve cm. 5.T      he back wing has to be exactly 1 and a half   centimetres away from the end of the straw. 6.  The front wing is half a centimetre away from the tip of the straw. 7.            There can only be one piece of tape holding each wing. 8.  The length of the straw. 9.    If we throw it inside or outside. What characteristics are we going to change? The characteristic that we are going ito change is how much weight we put on the back. Step by Step First we had to get the straw, graph paper, tape, ruler and scissors. Second we measure the graph paper the front ring is three by eight, and the back ring is three by twelve. Third we taped the back ring 1 ½ centimetres away from one end of the straw. Forth we taped the front ring ½ centimetres from the opposite end of the straw. Fifth we had to test how our gliders flew, we needed to hold all the gliders in the same spot and then we had to make sure we were stading the same way and in the same place, and then we had to make sure we threw it at the same speed that we threw the other ones.

Glider one (prototype): The back ring is 1 ½ centimetres away from the end of the straw. The front ring is ½ centimetre away from the other end of the straw. Glider two: The back ring is 1 ½ centimetres away from the end of the straw. The front ring is ½ centimetre away from the other end of the straw. We added an extra ring of tape on the back now we have 1 extra piece of tape on the end. Glider Three: The back ring is 1 ½ centimetres away from then end of the straw. The front ring is ½ centimetre away from the other end of the straw. We added another extra piece of tape now we have 2 pieces of tape on the end. Glider Four: The back ring is 1 ½ centimetres away from then end of the straw. The front ring is ½ centimetre away from the other end of the straw. We added another extra piece of tape now we have 3 pieces of tape on the end. Glider Five: The back ring is 1 ½ centimetres away from then end of the straw. The front ring is ½ centimetre away from the other end of the straw. We added another extra piece of tape now we have 4 pieces of tape on the end. Observations Glider 1: It flies straight forward till it hits something, it flies great. Glider 2: This glider had a curve when we threw it. Glider 3: The glider went up and then down, then it slid a little after it hit the ground. Glider 4: This glider also went straight up and then down. Glider 5: Glider five went up on a curve, and then went straight down.

Table of results


 * Gliders || Trial 1 || Trial 2 || Trial 3 || Average ||
 * G1 || 692cm || 594cm || 756cm || 680cm ||
 * G2 || 164cm || 456cm || 603cm || 407cm ||
 * G3 || 246cm || 338cm || 292cm || 255cm ||
 * G4 || 225cm || 300cm || 176cm || 233cm ||
 * G5 || 307cm || 350cm || 350cm || 334 cm ||

Conclusion 1. What do your results tell you? Our results tell us that the more weight that we added the worse it flew. 2. Was your hypothesis correct? Explain No, out hypothesis was not correct. We thought that if we added more weight the back it would fly better, but when we added more weight it flew worse. 3. What other observations did you make? The other observations that we made were the more tape we put on for weight made the glider straight up and then back down, Some of the times we flew the gliders it had a curve, and some times it curved straight up and then down. 4. How would you make your tests more fair? We could make out tests more fair by holding the glider in the same stop every time we throw it.

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