2D Kinematics Lab: Understanding Projectiles Materials Required - Brghily colered, object (lennis balls or marbles should work weli). Do not use a fealher or a crumpled pisce of peper. - Well lit area with flal coiored wall for beckground of video - Ruser, meter stick, or object with known length - Pasoo Capstone Video Analyis Goal Adapt \& extend the representations of canstant velocity model 8 unifom acceleration model to describe projecile motion. Experiment: Toss a bal underhand, recard a video of the bal's motion through the air. The ball shoudd move in the x−y plane: try for a throw that does not have a z-component of the velocty (no motion towards or away from the camera). Make sure that the meter stick or other abject with known langth is in the video, also in the x−y plane Analysis Open the video Lsing PASCO Capstone and create x \& y position time data for the projectile Open a new experiment, and cick the video analysis button at right If you don't see the buttons at right look for a tab in the middle of the screan at right. Open the movie file Click the create active objact bution Track the ball a motion through the air by clcking. Capstone should advance to the next frame. After you have tracked the ball across the screen, plot the data (position bme \& velacily time) separately for the horeontal and vertical drections Nole that there is a video controller to advance the video You may have to un-hide the cootrols at the bottom cf the page by clicking the tab in the middle an the bottom. These catrols look like this: Fit a quadratic carve to the y position data, and a line to the x position lime data. Include eech of these (4) plots, showing the curve i Ine for each for your report. Fit a ine to both of the valocty time plots (x&y). Write the equation of best fit for each of the four plats in your report using an equation editor and appropriate symbols. Include in the equabion the fit coefticents i slope values, along wth appropriate units. What is the physical meaning of the shope for each of the Inear plots? What is the physical meaning of esch of the coefficient values for the curved plot? The slope of the y direction velacity time graph should be a familar value. Take a screenshot from the pBused video for the apparatus porton of the lab report, after you have tracked the bell across the screen.
What model of motion applias to the x direction 'horizontel! ? What model of motion applias to the y cirection \{verical)? What does the intercept of the y drection velccity va bime graph reprecent? Conclusion: Herlzontal Direction Remind your reader What model of mation appica to the x direction (herizontaly? Wrie the hirst general formula that descubes 1-D consiant velocily molion (use the equalion edilor ri word lo do this). Δx−vˉvxt Wries a conpiele Englisil yenlence that describes whal this equalion says, using the mames for lhe physics vanables. Vertlcal Direction Remind your reader. What model of mation appies to the y direction (vericali? Write the first general formula that describes 1-0 uniform acceleration motion (use the equation editor in word to do this: Δvy−ayt Write a complete English sentence that degcrbes what this equation 9ays Write the second general formula that describes 1-D uniform accoleration motion fuse the equation editor in word to do this: Δy−21ayt2+v0vt Wrie a complele Englishi sentence that descrbes what thas equalion says. Make a motion map ial9o known as a moticn diagram) to represent the motion of the ball as it thes through the sir. apparatus secticn using gowerpaint, paint, of httog'liapp diagrams neti' In your pari wortis, summarize the propeclik motion model, and your experimental endence that suaporls be adea. What assumphons does the model make about wind resistance'?
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