Measuring Gravity at the Surface of the Earth

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How can you measure the acceleration due to gravity at the Earth's surface? Drop an object from a known height and measure the time it takes to hit the ground. Then use the formula for a falling object, , to calculate
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Contributed by: Sarah Lichtblau (March 2011)
Open content licensed under CC BY-NC-SA
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"Measuring Gravity at the Surface of the Earth"
http://demonstrations.wolfram.com/MeasuringGravityAtTheSurfaceOfTheEarth/
Wolfram Demonstrations Project
Published: March 7 2011