# 14 Pendulum Periods.doc - Computer 14 Jonathan D. Lugo,...

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Physics with Vernier© Vernier Software & Technology14 - 1Computer14Jonathan D. Lugo, Pedro Gracias, Tiago Saliba, Steven Fernandez, Alessandra Galvan, MeganEatonPHY2048LPendulum PeriodsOctober 15, 2019
14 - 2Physics with VernierComputer 14Pendulum PeriodsA swinging pendulum keeps a very regular beat. It is so regular, in fact, that for many years thependulum was the heart of clocks used in astronomical measurements at the GreenwichObservatory.There are at least three things you could change about a pendulum that might affect theperiod(the time for one complete cycle):the amplitude of the pendulum swingthe length of the pendulum, measured from the center of the pendulum bob to the point ofsupportthe mass of the pendulum bobTo investigate the pendulum, you need to do acontrolledexperiment; that is, you need to makemeasurements, changing only one variable at a time. Conducting controlled experiments is abasic principle of scientific investigation.In this experiment, you will use a Photogate to measure the period of one complete swing of apendulum. By conducting a series of controlled experiments with the pendulum, you candetermine how each of these quantities affects the period.Figure 1OBJECTIVESMeasure the period of a pendulum as a function of amplitude.Measure the period of a pendulum as a function of length.Measure the period of a pendulum as a function of bob mass.
Physics with Vernier14 - 3Pendulum PeriodsMATERIALScomputerstringVernier computer interface2 ring stands and pendulum clampLoggerPromasses of 100 g, 200 g, and 300 gVernier Photogatemeter stickprotractorPRELIMINARY QUESTIONS

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