# Lab Air Tracks Period 6 Physics .pdf - Lab- Conservation...

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Lab- Conservation of Mechanical Energy, Air TracksIntroductionThe purpose of the lab is to determine if the mechanical energy is conservedfor a falling object, and to observe the work-energy theorem in action.The law ofconservation of energy states that energy can neither be created nor destroyed - onlyconverted from one form of energy to another. This means that a system always hasthe same amount of energy, unless it's added from the outside.The work-energytheorem states that the work done by the sum of all forces acting on an object isequal to the change in the object's kinetic energy.We pushed the cart wheel while the air track was on and tied the string to thecart and a mass. We recorded the weight of the mass. We then took measurements ofthe length of the index card and allowed the mass to fall exactly 6 inches beforecatching it.For the hanging mass, we took five trials with varying mass and recordedthe data as shown in Table 1. In this experimental setup, a hanging mass pulls the cartas shown in Figure1. We use the time and the length of the card to determine thecart’s velocity as it passes through a photogate using the formula v=d/t. From this we

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