The Foot-Pound-Second (FPS) System of Units - Maple Help

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The Foot-Pound-Second (FPS) System of Units

Description

 • The FPS system of units has the foot, pound, and second as its base units.  Unlike modern systems of units, composite dimensions are not necessarily represented by a product of powers of the base units. For example, the unit of power, the horsepower, is not equal to one square foot pound per cubic second.
 • When used in conjunction with the UseSystem command, the FPS system sets the following units for the given dimensions.

 Dimension Name Unit Name length foot mass pound time second plane angle radian solid angle steradian force poundal energy poundal*foot power horsepower pressure poundforce/inch^2

Examples

Notes:

 – To enter a unit in 2-D Math input, select the unit from the appropriate Units palette. If the unit you want is not there, select $\mathrm{unit}$ and then enter the unit.
 – In Maple 2015 and later versions, the double brackets around a unit are not displayed unless you are editing the unit.
 > $\mathrm{Units}[\mathrm{UseSystem}]\left('\mathrm{FPS}'\right)$
 > $\mathrm{with}\left(\mathrm{Units}[\mathrm{Standard}]\right):$
 > $5⟦\frac{{'\mathrm{ft}'}^{2}'\mathrm{pound}'}{{'s'}^{2}}⟧$
 ${5}{}⟦\frac{{{\mathrm{ft}}}^{{2}}{}{\mathrm{lb}}}{{{s}}^{{2}}}⟧$ (1)
 > $\mathrm{combine}\left(,'\mathrm{units}'\right)$
 ${5}{}⟦{\mathrm{poundal}}{}{\mathrm{foot}}⟧$ (2)
 > $\frac{}{⟦'s'⟧}$
 $\frac{{3048}}{{10787315}}{}⟦{\mathrm{HP}}⟧$ (3)
 > $\frac{}{{⟦'\mathrm{yard}'⟧}^{2}}$
 $\frac{{5}}{{9}}{}⟦\frac{{\mathrm{lb}}}{{{s}}^{{3}}}⟧$ (4)