What Is This Tool?
This tool allows you to convert force values from the pound foot per square second unit, commonly known as the poundal, into petanewtons [PT], an SI-derived unit for extremely large forces.
How to Use This Tool?
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Enter the force value in pound foot per square second.
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Select 'pound foot/square second' as the input unit and 'petanewton [PT]' as the output unit.
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Click convert to see the equivalent force expressed in petanewtons.
Key Features
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Supports conversion between the pound foot/square second and petanewton [PT] units.
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Browser-based and easy to use without any installation.
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Ideal for translating legacy imperial FPS units into large-scale SI force values.
Examples
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Converting 100 pound foot/square second gives 1.38254954376e-14 petanewton [PT].
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Converting 0.5 pound foot/square second results in 6.9127477188e-17 petanewton [PT].
Common Use Cases
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Solving classroom problems involving FPS force units where pound denotes mass.
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Analyzing legacy engineering documents using imperial units for force.
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Comparing small-scale mechanical forces to astronomical or planetary scale forces in geophysics and astrophysics.
Tips & Best Practices
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Ensure the input force is expressed in pound foot per square second before converting.
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Use petanewton as the output unit only when dealing with extremely large forces to maintain meaningful results.
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Cross-check conversions when working between imperial and SI unit systems for accuracy.
Limitations
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Because the conversion factor is extremely small, results in petanewton will often be tiny numbers unsuitable for everyday force calculations.
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Petanewtons are practical only for very large force magnitudes, so avoid using this unit for small-scale dynamics to prevent confusion.
Frequently Asked Questions
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What is a pound foot per square second?
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It is a force unit in the FPS system equal to the force needed to accelerate a 1 lb mass at 1 ft/s², also known as the poundal.
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What does petanewton measure?
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A petanewton is an SI-derived unit representing extremely large forces, equal to 10^15 newtons, used in planetary and stellar-scale physics.
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When should I use petanewton units?
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Use petanewtons to express very large forces encountered in astrophysics, geophysics, and planetary sciences rather than small everyday forces.
Key Terminology
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Pound foot/square second
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A FPS force unit equal to 1 lb mass accelerated at 1 ft/s², commonly called the poundal.
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Petanewton [PT]
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An SI-derived force unit equal to 10^15 newtons, used for planetary and stellar-scale forces.
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FPS system
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The foot–pound–second system of units, an imperial measurement system where pound denotes mass.