Lab #3

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Texas Tech University *

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1403

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Mechanical Engineering

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Apr 3, 2024

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Uploaded by gisellepaz71

Lab 3 Report Section 03: Constant Acceleration: Dry Ice Puck on a Ramp Pivot Interactivities Giselle Paz 6/12/21 PHYS 1403

INTRODUCTION In this lab, we learn how to construct a velocity vs time graph. To do this, we watched an interactive video that displays a dry ice puck sliding on an aluminum ramp. In addition, we learn how to analyze a position vs time graph with a non-constant velocity, linearize data, generate a mathematical relationship between position and time, and make predictions regarding the puck’s motion. MATERIALS In this lab experiment, we used the following materials: ● Dry Ice Pucks ● Aluminum Ramp ● Stopwatch ● Protractor ● Ruler PROCEDURE 1. Allow video to play and watch phenomena (dry ice puck sliding down the aluminum ramp). 2. (Set the video to Mass A and ramp angle #9) Use the tool icon, select the stopwatch and reset. * Note: if we want a position vs time graph for the sliding puck on the ramp, we cut to frame 42 (ribbon no longer is attached to puck) . After, find the angle of the ramp using the protractor tool, and measure. *Angle measure: 22 degrees 3. Use the ruler tool and measure how far the puck travels to the bottom of the ramp. *Measurement:164 cm

4. Now you can choose a mass and ramp angle; I chose Mass D: 25 g and Ramp Angle #9. With the mass and angle, we will be recording our data into a table to later create a graph. Continue this process until the puck has reached the bottom of the ramp at time intervals of 0.1s. DATA & DATA ANALYSIS Table and Graph 1: The table below shows our recorded data of all the positions and times until the puck had reached the bottom of the ramp. We recorded the time from 0.1s to 0.9s in cm .

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When we plot the points from our table, we get the following graph and Position Curve : Using the previous table, we add another column ; however, in this column, we changed our formula to s^2 (time squared/t^2) . Since the graph above was not linear, we have to linearize it to obtain a better calculation for the relationship.

CONCLUSION The purpose of this experiment was to learn how to create a velocity vs time graph. While watching the interactive video, following instructions, and collecting our data, we were able to make our tables and graphs. The first table demonstrates the time and positions that the puck had until it reached the bottom of the ramp. In our graph, we are able to see a parabola (y=Ax^2) , this indicates that as the puck came down the ramp, it began to accelerate and therefore had a non-constant velocity . In order to linearize our graph, we changed the formula on the column we added to the previous table to s^2. After doing so, we obtain a slope of 1.00 cm/s^2 , an intercept of 0.00 cm, an RMSE of 0.00 cm, and an r of 1.00. To conclude , the puck does not have a constant velocity on the ramp. PERSONAL LEARNING EXPERIENCE In this experiment, I was able to learn while also using my knowledge/skills from the two previous labs. In this particular activity, I found that making a velocity vs time graph to be easy since it had the same concept we had been reviewing over the last lab; however, the only difference was that our time was squared. Being able to see that the puck moved down the ramp quicker made it helpful to see that there had been a change in the velocity. I also was able to learn about how to linearize a graph which was not only helpful but I grew to understand what was occurring because I was able to see the graph’s change. Overall, I enjoyed doing this lab and learning about velocity.