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Physics 4AL 3

# Physics 4AL 3 - Physics 4AL Lab for Science and Engineering...

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Physics 4AL Lab for Science and Engineering Mechanics Experiment #: Lab Section: Name: UID: Date: TA: Partner: Lab Station:

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Introduction/Purpose: This lab was devised to serve two purposes; Measure a spring constant, and prove conservation of energy. The system is comprised of an air track, a glider that runs over the track, springs on either side of the glider which are mounted to the respective side of the air track, and a mass that hangs off of one side of the track. By hanging a mass, a force is exerted on the springs, which displaces them from there natural position. By measuring this displacement, we can measure the spring constant of the springs. In order to measure conservation of energy, we use a photo gate to measure how many tick marks on top of the glider pass by as the glider moves down the track. By measuring the number of tick marks, the displacement can be determined. By measuring the interval between each tick mark, we can then measure time and velocity. Knowing these three pieces of information, we can then determine the potential energy, kinetic energy, and the total energy. Theory/Equations: The theory behind this experiment is of conservation of energy. The first step is to figure out the spring constant, as it is integral to the potential energy in this case. The second step is to figure out the velocity, as it is integral to the kinetic energy. With these two values, total energy can be obtained, and thus, conservation can be shown if it in act is true. The necessary equations are… F=-kx (Force = - Spring Constant x Displacement) Potential Energy = ½ kx² Kinetic Energy = ½ mv² = ½ V²(M + m/3)* Total Energy = Potential Energy + Kinetic Energy Velocity = .004m/T1 * The second equation for kinetic energy factions in the energy associated with the springs. Procedure: The first step in the process is to measure the weight of each of the hanging masses, as well as the glider and the springs. For part A, we set up the air, leveled it to get rid of as much error as possible, and placed the glider on top. We then connected a spring
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Physics 4AL 3 - Physics 4AL Lab for Science and Engineering...

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