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# Simple Harmonic Motion and Pendulums

Featured in PASCO’s Advanced Physics Teacher Guide

This manual features over 30 College Board curriculum and AP Physics exam inspired lab activities.

\$49

### Lab Summary

Use a photogate and pendulum to determine earth's gravitational acceleration.

### Theory

Using a simple pendulum, design and conduct an experiment to determine earth's gravitational acceleration through a graphical method.

• Explore the basic mathematical concept and behavior of a simple pendulum.
• Using the theory and mathematical relationships involving a simple pendulum, determine an experimental value for earth's gravitational acceleration.

### Method

Students gain experience conducting the following procedures:

• Measuring the pendulum arm length and period for several different pendulum arm lengths while holding the bob mass constant.
• Plotting pendulum period versus square root of arm length to create a linear relationship.
• Using a line of best fit whose slope is equal to 2π/√g to extrapolate a value for the acceleration due to gravity.

### Sensors / Equipment Used

The Digital Adapter allows ScienceWorkshop analog sensors to be connected and used with PASPORT interfaces.

\$59

## Photogate Pendulum Set(ME-8752)

Set of four pendula (brass, plastic, wood, and aluminum) that are ideal for timing experiments with photogates.

\$40

Monitors the motion of objects passing through its gate, counting events as the object breaks the infrared beam. For use with PASPORT and ScienceWorkshop Interfaces.

\$45

## Base and Support Rod(ME-9355)

Provides a level base for basic lab experiments.

\$79

## Pendulum Clamp(ME-9506)

Hang up to three pendula from precisely the same height.

\$20

Meter Stick
Pendulum Bob
Scissors