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Showing posts from March, 2025

Rotational Kinematics lab

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1. Use the velocity components to determine the direction of the velocity vector. Is it in the expected direction? 1. From the x-t and y-t images, the two curves show a sine and cosine relationship, indicating that the object is in uniform circular motion. Since position over time behaves as a sine and cosine function, this means that the velocity is their derivative, and the direction of the velocity is always perpendicular to the direction of the radius, so the velocity vector varies in the tangential direction, which is consistent with the theory of circular motion. The formula used to calculate speed 2. Analyze enough different points in the same video to make a graph of the speed of a point as a function of distance from the axis of rotation. What quantity does the slope of this graph represent? In this experiment, we investigated the relationship between radius, linear velocity and acceleration in uniform circular motion by analyzing the motion of three different points on a r...
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Car Pulled by Rope

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  This is when we did the experiment. Experimental data Experimental and calculated data The formula used to calculate speed How do the predicted velocity and the measured velocity compare in each case?  Did your measurements agree with your initial prediction?  If not, why?  I calculated the magnitude of v using the formula I worked out in class and found the prediction V to be much larger than the magnitude of v I did in the lab. Their percentage difference ranged from 26% to 74%. This could be due to the fact that the formula does not involve friction or air drag, or it could be due to measurement errors in the experiment. Does the launch velocity of the car depend on its mass?  The mass of the block?  The distance the block falls?  Is there a choice of distance and block mass for which the mass of the car does not make much difference to its launch velocity? From the velocities obtained from the experiment and the formula. If the mass of the block ...
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Hanging Bridge Lab

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Graph of experiments and calculations Data from experiments  formula was used to calculate the height Calculation uncertainty Where do the two curves match?   From the graphs of the data, it can be seen that when the central mass M<0.09, the experimental data are in good agreement with the theoretical curve ( predicted equation). Where do the two curves start to diverge from one another?   When M > 0.1 kg, the experimentally measured vertical displacement is significantly larger than the theoretically predicted value. What does this tell you about the system?  Show that the theoretical model (assuming no friction and no elasticity) is only applicable to the small mass case and that the actual system has pulley friction or rope elasticity effects. What are the limitations on the accuracy of your measurements and analysis? There is an uncertainty of ±0.005 m in the height measurement. (This was obtained by me and my team by measuring the same mass and t...
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Frist Project: Modeling a Rocket Launch

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 Our slides： Individual Contribution In the first Project I did most of the program work (Vpython). In addition, I used video analytics to calculate the initial velocity of the projectile motion, mainly for 30 degree angles and 9, 10 and 11cm stretches. Finally, I helped to calculate the constant K of the rubber band and calculated the initial velocity using the constant K and the maximum height. resource slide's links 
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First Lab：Motion Detector and Video Analysis

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Purpose   Learn to perform experiments using LabPRO's Motion Detector and analyze data using the Video Analyze application, mastering data analysis methods and using data for further calculations and interpretation.
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