Lab #1 | Georgia Tech PHYS 2211: Physics I

um I'm all over and today I'm going to do a little presentation on my first slab for physics one um physics 2211 um it's about constant velocity so first I want to see the purpose of the lab which is to apply Newton's fundamental law fundamental Laws of Motion in the real world um it mainly focus on Newton's Second Law or the momentum principle and verifying its accuracy by comparing position versus time graphs created using the data collect the real world and data produced using a computational model Newton Second Law so Newton Second Law explains how forces acting on a system from its surroundings cause changes the momentum of the system over time if there's no net force acting on the system then the change of momentum is zero and velocity will remain constant and that's what we tested because Delta V is Delta V is zero or we assumed it to be so um here's the momentum update formula and the velocity take formula on the screen so some of the procedures I'll go over these real quick um first just observe the motion of some object I chose a water bottle um that's moving at the same Speed without changing direction I try my best create um capture video with the motion then analyze the video using tracker to extract the object's positions and corresponding times I had to observe the motion of an actual object in the real world and record it myself I put it in track here and then I analyze the motion um then I had to construct a computational model that actually describes my observations based on physics principles um such as n newon Second Law or equivalence um and lastly compare my model to my observations by plotting both The observed position versus time and the predicted position versus time on the same graph I didn't use a spreadsheet but I just put in side side by side so some of the assumptions that we made that I made going into it um I did time stamps on track R 0.5 seconds the bottle rolled for a total 3 seconds the mass of the bottle was 0 uh 625 kg including the bottle and the water in it the initial velocity was1 uh 0 0 on my computational model the initial position was 3.5 um I'm what uh in whatever units tracker uses I don't think they meters and is also ass and know some some assumptions that I need to make in order for this to be accurate or for the velocity be constant in theory is that the next external forces in the bottle are zero so no friction IR resistance and things of that nature here's a program um down the bottom left I don't know if you can see my mouse tracker like my cursor but uh there's the mess the ball and then the velocity uh the Y lasted for 3 seconds 0.5 so model versus results in experimental error also it's important to note that I did I did it going from right to left not left to right so the velocity is obviously going to have a negative slope um based on the so we can ignore the why really because you can see that the deviation on the like on the y axis is pretty low I mean the that was not the point it's just that I the time STS that I chose um because of the angle it look a little weird but it dis it didn't displace that much in the y- AIS um but if you take the slope of the x-axis it looks pretty similar to the computational model uh to to what it predicted right the ones my actual result from tracker on the right and then the competition models on the left so some sources some potential sources for experimental error are friction air resistance and me just not clicking in the exact same um why like not the exact same line in the Y plane um so I might have moved the point slightly up and down on the screen because I didn't get to see my old plots some of the questions that this answers or that I well I need to answer all this lab are if I were to flip the A's meaning if x negative X would interchange then the side the velocity would be different and another question what like is it possible to say how many forces could be added together given zero net force um and the answer that I came to is no because some of them are simply invisible like air particles and you can't really calculate them you know and yep that's all I have for today uh thank you very much for your time and have a good day