Question 5 Based on your graph , what kind of acceleration does the ball have along the y-axis (constant or changing )? How do you know this ? Question 6 What is the magnitude of the acceleration of the ball along the y-axis ? How do you know this 7 G) Compare the acceleration of the ball along the y-axis that you calculated to its textbook value (-9.8 m/s 2) by using a percent error . (NOTE :Make sure your units are in meters . NOTE : this is not a precise measurement , where we are estimating the actual measurement uncertainty . Instead , we're just checking against the textbook value to see if the answer is plausible .) H) At this point in the lab all of the work you have done should be showing you that the velocity of the ball along the y-aris is changing because along this axis gravity is acting on the ball. However , along the x-axis , gravity is not acting on the ball and therefore the velocity is constant . This is the single most important fact about projectile motion . Think about what this implies about the acceleration along each axis. I) Make a chart like Chart 3 below . For the Horizontal Launch row , ll in the columns for the acceleration for each axis based on what you determined in H). NOTE : You will ll out the rest of the chart in Part3 which begins on the next page . Gype ofLauncb ---- CHART 3 Part 3 - Initial Positions and Velocities Now you are going to determine what the initial conditions are for the ball along each axis. NOTE : Do not close out of your velocity graph on Excel . A) Go back to your photo and using the rst image of the ball determine the initial position of the ball on each axis. This data should also be in Charts 1 & 2. Put this data in Chart 3 for the Horizontal Launch row