Physics Week 8 Laboratory Repor1

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Physics Week 6 Laboratory Report Lab 6a1: Conservation of Energy in Spring Mass System Name: Minwoo Choi Group #3 Date: March 2, 2023 Submission Date: March 9, 2023 Course/Section: Phys111A-002 Professor Apte Partners: Kevin Moranchel, Jake Mulrenan, Aavinaash Rampersad Introduction and Background Our objectives in this lab are to use the work-energy theorem by measuring the force done on the object and kinetic energy along with understanding how the total work done on the object changes the object’s overall energy. Physical work can be defined as the amount of physical effort you exert to achieve change over the time you’re working. In physics, force acting upon an object or change in position can be defined as: W = F x S = Fscos Ø Ø is the angle between force and displacement vectors. Where the direction of force is the same as displacement, work will become: W = Fs Work is scalar with the unit of joule. This is the same unit as energy. The unit of work is the product of force and displacement. The work-energy theorem states that the work done by the net force on an object equals the change in its kinetic energy:

Went = Fnet x s = delta(K)€ = KE2 – KE1 In this lab, we will use a frictionless air-track to demonstrate the work-energy theorem by determining the work done on the glider and change in kinetic energy as its being pulled by constant force. Experimental Setup Equipment - Computer with Capstone - 850 Universal interface - Force sensor - Rotary motion sensor - Air-track - Air supply with hose - Glider set (glider, 50-g weights(x4), a hook, and a string) - Metal jack - Single sheave pulley - Short Rod - Right-angle clamp - L-shape aluminum rod - Protractor - 1-m stick - Electronic balance Part 1 Setup

Part 2 Setup Experimental Procedure in Manual for both Results (Experimental Data)

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Calculations

Analysis and Discussion The overview we went over in part 1, the work energy theorem says that work done on an object is equal to the change in kinetic energy. The difference between my net force and tension were very similar throughout my part 1. This proves that the work energy theorem is a valid theory. In part 2, work was equal to the sum of the change in both kinetic and potential energy. The application of the theorem in my part 2 was less apparent mostly because my difference in percentage was large. The percents being far apart meant that this theory did not work for part 2. The results from our experiment were not very accurate but could display the work energy theorem in some parts. Part 1 had many percent differences that varied from large to small while part 2 also had large differing data points. Conclusion The results from the first part of the experiment were fairly consistent with the work energy theorem, while the second part didn’t follow the theory as much. This may have occurred possibly due to the angle that we put on the incline that affected the results we obtained throughout the last part. Furthermore, this experiment had much more room for error because the instructions were varied vague. This whole procedure had to do with your group finding almost every part of the lab, which meant some parts could have been performed the wrong way. For example, when you had to keep the string parallel to the sensor, our group was having a hard time keeping it on the pulley. This could have created less favorable results than the ones we should have gotten. In conclusion, our results in part 1 were fine but mainly because of human error, our part 2 was less accurate.

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