03 Kinematics (2D) - Lab Report(3)

Part 3: Comparing Results You should now have two different measurements of the initial launch velocity of the ball. The percent difference is computed as follows: percent difference = | measured value 1- measured value 2 | 0.5 ×( measured value 1 + measured value 2 ) × 100% Determine the percent difference of your measurements. Also determine the average of the two measurements (show your work for both calculations). If your percent difference is larger than 5%, let your professor know. % error = ______ v avg = ______ m/s Part 4: Shootin’ For All the Marbles!!! Ask your professor to pick an angle at which to set your launcher. Then measure the height of the table. (Remember, the launch height will be the height of the table plus the height of the launcher!!!) Angle = _____° (Assigned by the professor) Table height = _______ cm Launch height = _______ cm Aim your launcher over the edge of the table. Do NOT fire your launcher!!! Firing the launcher before being instructed to do so will result in failing this section of the lab or being assigned a new angle. 1. Draw a diagram of the situation, clearly labeling v 0 , d , h , θ , and your origin. 2. Use your knowledge of vectors to break the initial velocity into x- and y- components. Draw a diagram of the initial v 0 vector and show your work. Use your average velocity from Part 3 as v 0 . v 0 x = ______ m/s v 0 y = ______ m/s 3

Shootin’ For All the Marbles!!! Name:_____________________________ Section #: _____ _____________________________ _____________________________ Indicate with an ‘X’ , the location that your ball impacted the target. +2% +4% +1% 6