3 Procedure 1. Open our present online lab by clicking on the following link: https://phet . colorado . edu/en/simulation/projectile-motion 3.1 Horizontal and vertical displacements of a projectile 2. Choose Lab window on the right side of your screen. 3. Set the initial speed of your projectile to be vo = 15.0m/s and the initial launch angle do = 450. Fire the projectile. 4. When you fire the cannon, the path of the projectile is shown and with a marker drawn at every 0.1 sec of the projectile motion time, as show in Fig. 1 Initial Values height. 0 m Angle: 45" Speed: 15 m/s Cannonball Mass 17.60 kg Diameter 0.18 m 0.7 Gravity 9.81 m/s' 1.5 s Range 15.91 m Height 4.87 m Air Resistance Altitude om Drag Coefficient: 0.47 15.0 m Initial Speed 15 mis 8 2 11 9 Normal Projectile Motion PHET : Figure 1: (Color online) Schematics for Step 5. 5. Using both equations (5), calculate the horizontal and vertical position of the pro- jectile at the following time: 0.2 sec., 0.4 sec., 0.6 sec., 0.8 sec., 1.0 sec., 1.2 sec., 1.4 sec., 1.6 sec., 1.8 sec., 2.0 sec.. Record your results in Table 1: t, sec. 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 2.0 ac (t) , m y(t), m Table 1. Theoretical, or calculated results for the horizontal x(t) and vertical y(t) displacements of the projectile after each 0.2 sec.. 6. Use the tracer tool to gather the data about the projectile's range and height at every other marked point of its trajectory which corresponds to 0.2 sec.-increment. Record the obtained results into Table 2:1, sec. 0.2 0.4 0.0 0.8 1.0 1.2 1.4 1.6 1.8 2.0 1(1), m 351(3) m Table 2. Experimental (IIIEFLt-Blll'ed) data for the horizontal .170.) and vertical y(f) displacements of the I'n'cjectile after each 0.25612. 7. Are the theoretical and experimental results in Table 1 and Table 2 identical or just close to each other? 8. For the initial velocity and launch angle accepted and used in Step 9, calculate the maximum height of the projectile trajectory using Eq. (7) and its range from Eq. (8). 9. Verify your calculated results from the previous Step 14 using the tracer tool E at the highest and the terminal points of the investigated trajectory. A green (lot at the top of the path shows the apex (or the highest point) of the path of our I'n'ojectile