# lab2 - Zhichuan Ban Physics 221 MM Report of Lab PM...

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Zhichuan Ban Physics 221 MM 09/29/2015 Report of Lab PM – Projectile Motion Objective To learn about the theory and principle of projectile motion, using orthogonal decomposition method to divide one force to two components. Discuss the projectile motion of a small metal ball and verify the equation on the blackboard. Method 1) Set up the projectile launcher so that it is level and fires at 30 degrees. 2) Carefully measure the distance from the floor to the level that the projectile is launched from. 3) Fire the projectile and mark where it lands. Carefully realign the board and repeat to take a total of 3 shots. 4) Carefully determine the range of each shot by measuring the positions on the paper, remembering to compute the total horizontal distance covered. 5) Find the average. Data Act.2 Degrees/Times 1 2 3 4 5 Ave SD SE 20 64.2 64.8 64.9 65.4 64.8 64.8 0.427 0.19 25 77.8 80.4 80.6 81.7 80.2 80.14 1.431 0.64 30 89.2 89.6 89.7 92.1 90.2 90.12 1.414 0.51 35 96.3 96.8 97.2 97.5 96.5 96.86 0.493 0.22 40 99.7 99.8 100.1 100.6 101.2 99.84 0.633 0.28 45 101.4 101.8 101 99.4 100.2 100.7 6 0.963 0.43 50 100.6 97.8 98 96.4 96.9 97.94 1.53 0.72 55 96.5 94.8 95.2 93.4 94.2 94.82 1.16 0.52 60 85.8 86.8 86.8 87.5 84.7 86.26 1.09 0.49 65 76.6 74.6 74.1 73.8 74.2 74.66 1.62 0.72

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