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OK, I guess I originally misread your question. You are referring to inch-pounds (torque, I guess). Torque or work or energy is force (times) distance. So the [in lbs] implies that you are talking about pounds-force. With [lbf in], it is just clarifying that it is force.

Many people think of mass and 'weight' interchangably. lbs refers to mass. 2.2 lbs is approximately equal to 1 kilogram mass. lbf refers to force. a 1 pound mass (lb), will exert a 1 pound force (lbf), if there is 1 Earth 'g' of acceleration. (approx 9.8 m/s2 or 32.2 ft/s2). Alternatively, take that 1 kg mass, which 'weighs' 1 Newton. It has a mass of 2.2 lbs, and a 'weight' of 2.2 lbf.

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Q: Does in pounds unit different with lbf in unit?
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pounds of force Foot pounds or torque. Measured with a torque wrench.


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Assuming a graviational constant of g=9.81 N/kg, you would convert this mass into a weight of mg = 10.5 kg x 9.81 N/kg = 103.005 Newtons and convert it to pounds force (lbf) by the conversion value of 1 N = 0.2248 lbf. Therefore, 103.005 N x 0.2248 lbf/N = 23.16 lbf, or 23.16 lbs It weighs 23.16 pounds, give or take 0.01 pounds due to rounding error.


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pound-force per feet2 (lbf/ft2)


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Newton is a unit of force, kilogram is a unit of weight, so the two are actually quite different.On Earth, the gravity is about 9.8 meters per second square, which is the same as 9.8 Newton per meter, so the 500 kg. would weigh almost 5000 Newton. Weight is a force, so of course you measure it in units of force.


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the newton (: