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Ton-Force (Short)


The short ton-force is a unit of force based on the short ton, primarily used in the United States.



  • A short ton equals 2,000 pounds (lbs).



  • The short ton-force is the force exerted by one short ton mass under standard gravity.



  • Mathematically:



1 short ton-force=2,000 lbs×9.80665 m/s28,896.44 newtons1 \text{ short ton-force} = 2,000 \text{ lbs} \times 9.80665 \text{ m/s}^2 \approx 8,896.44 \text{ newtons}

  • It is used in industries like engineering and construction where forces related to short tons are relevant.



  • Note: This differs from the metric ton-force (tf) and long ton-force used in other systems.



Pound Foot per Square Second [lbf·ft/s²]


This unit represents a torque or moment of force per unit time squared (though it’s an uncommon combination and can sometimes be context-specific).



  • It combines pound-force (lbf), a unit of force, with foot (ft), a unit of length, divided by second squared (s²), a unit of time squared.



  • It may be used in dynamics or rotational mechanics when dealing with angular accelerations or rate changes of torque.



  • In basic terms:



1 lbf\cdotpft/s2=force×distance÷time21 \text{ lbf·ft/s}^2 = \text{force} \times \text{distance} \div \text{time}^2

  • Since 1 lbf ≈ 4.44822 newtons and 1 ft ≈ 0.3048 meters, this can be converted into SI units as:



1 lbf\cdotpft/s21.35582 N\cdotpm/s21 \text{ lbf·ft/s}^2 \approx 1.35582 \text{ N·m/s}^2

  • Note: This unit is not commonly standard; usage depends on the specific physical context, like rotational dynamics.





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