Changing A Catapult

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Experiment 1: Changing the degree to which the catapult is released from.

Abstract: For a long time, catapults have been used in many different ways and come in many different sizes. In physics, they can be tested and used in many different ways also. The first investigation conducted was to see how the degree at which you release the catapult from affects the range of the projectile. Five different angles were tested and graphed. The relationship between the range and degree of release were linear.

Method/ methodology: In this experiment, the catapult was set on the floor and a measuring tape stretched out about 3 meters from the catapult. A projectile was placed on the catapult and then pulled back at a certain angle, each time the projectile
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While conducting this experiment we found the relationship to be linear. The equation was found to be r= 6.06p - 126.77. This equation shows that the slope is 6.06 which is the rate at which the range changes relative to the angle. The y-intercept of -126.77 is the minimum value at which . When doing the experiment, 6 measurements of degrees were made by looking at a protractor. When pulling and releasing the catapult from different angles, it made the projectile decrease in range evenly at a constant rate. This is because no mass was changed or added, only angles changed. When the angle increases, the range increases, for example, when the angle was 90 degrees, it traveled the furthest. When when the angle decreases, the range decreases. When changing the degree of release or study may have encountered a few unavoidable errors. The first possible error could have occurred when the angle was measured. Using the same protractor and person reading it the way the protractor set on the side of the catapult was hard to get it even due to the catapults pivot sticking out the side. This could have made the release angle a little more or less and would also slightly affect the data. Another error that may have occurred comes when seeing to the exact millimeter where the wooden cube landed. This may have caused an imbalance in data by slight measurements. Even when videoing the landing spot the range varied enough to where you couldn't zone in enough to see the cube land. It's also hard to determine where it hit then taking a video from a bird's eye view to the objects landing. The final error that could have occurred is how fast the catapult was released and how fast it reacted by shooting. This was unmeasurable and therefore unable to be avoided. It may have given the catapult more or less power to throw the projectile. Some things that were done to avoid error where things like shooting from the same

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