Lab 3 - Picket Fence Free Fall

Lab 3 - Picket Fence Free Fall - Wendy Candler 2/13/08 Lab...

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Wendy Candler 2/13/08 Lab 3 Write-up Picket Fence Free Fall Purpose Free fall occurs when Earth’s gravitational pull is the only force acting on an object. Although we cannot totally remove all other forces such as air resistance, usually its effect is small enough to be ignored. When an object is in free fall its acceleration is at a constant rate that is usually represented by the symbol g . To find and test this rate of acceleration we used a “picket fence,” a clear plastic strip with alternating black bars, and a Photogate. The Photogate uses a beam of infrared light that passes through the clear plastic and detects the opaque lines as it blocks the beam. By measuring this timing the program calculates and graphs the distance and velocity of the falling object. Data Tables Trial 1 2 3 4 5 6 Slope (m/s 2 ) 9.688 9.740 9.769 9.743 9.801 9.831 Minimum Maximum Average Acceleration (m/s 2 ) 9.688 9.831 9.762 Acceleration due to gravity: 9.762 ± 0.072 m/s 2 Precision: 0.072 x 100 = 0.74 %
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Lab 3 - Picket Fence Free Fall - Wendy Candler 2/13/08 Lab...

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