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This is a verification lab; you will be comparing experimental reality to theoretical predictions of a ball's launch speed after it has rolled down a
This is a "verification" lab; you will be comparing experimental reality to theoretical predictions of a ball's launch speed after it has rolled down a ramp. Setup Set up a ramp on a table. You'll be rolling a ball down this ramp. You'll get the best results if you arrange it so that the ball travels straight off the side of the table. See the figure below: release from rest h a launch straight off table ( horizontal Launch ) X Diagram of a ramp built on table, designed so that a ball rolls straight off the edge of the table. Note that all heights are to be measured from where the ball leaves the ramp, which is slightly above the table. Books, notebooks, and binders all work very well, though if you have scrap wood laying around that is usually best. Take a picture of your setup and insert it here: Note what object you will be rolling down the ramp, and record any relevant measurements:Procedure 1. Apply conservation of energy to predict the speed of the ball when it reaches the end of the track. Pay particular attention to how you measure the starting height [see diagram above]. Derive a symbolic expression before calculating. Record all data and show all your work in the space below. 2. Measure how far the ball lands from the track. and how far it fell vertically after leaving the track (see diagram above). Use this data to experimentally determine the launch speed. It is highly recommended that you run many trials as this will produce stronger results. Derive a symbolic expression before calculating. Record all data and show all your work in the space below. Analysis questions 1. Which gave a larger value for launch speed: the prediction from energy conservation, or the experimental calculation from kinematics analysis? What factors might cause this to be larger? 2. The percent difference between two quantities is given by their difference divided by their average. What is the percent difference between your prediction [energy] and experimental [kinematics) calculations? Show your work. 3. Considering the percent difference between your two calculations. what can you say about your experiment and the results? Do you think your conservation of energy calculation accurately predicted the hall's speed? Do you think the kinematics calculation accurately measured the ball's speed? Explain your reasoning. Analysis questions 1. Response to question 1 is consistent with the data and results presented. Response is explained fully and clearly explained. The percent difference is calculated correctly and the work is shown either handwritten or typeset with an equation editor. Response to question 3 is complete and reasoning is explained clearly. Responses to questions 1 and 3 are written in complete sentences following spelling and grammar conventions appropriate to professional science communication
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