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 Fundamental Units

Table of Units

       Units

    Systems

Mass

  M

Length

    L

Time

   T

Velocity

v = L / T

Acceleration

a = v / t

 =  L / T

Force

  F = M a

Work

 W = F s

Power

 P = W / t

Pressure

 P = F / A

Temp.

T

Heat

Q = Mc(ΔT)

Metric

Consistent

(SI)

1 kg1 m1 s1 m/s1 m/s21kgm/s2 = 1N

1 Newton

1 Nm = 1 J

= 1 Joule

1 J/s = 1W 

 = 1 Watt

1 N/m2

=1 Pa

(Pascal)

 1 C1 kcalorie

(1 kcal)

Metric

Gravitational

1 kg1 m1 s1 m/s9.8 m/s2=1g9.8kgm/s2=

1 kgf = 9.8N

1  kgfm1 kgfm/s1 kgf/m21 C1 kcal
American Consistent1 slug1 ft1 s1 ft/s1 ft/s21 slug ft/s2=

1 lbf

1 lbf ft1 lbf ft/s1 lbf/ft21 F 32 Btu

 

American

Gravitational

1lbm=

(1/32)slug

1 ft1 s1 ft/s32 ft/s2=1g(1/32slug)*32ft/s2

=1 lbf

1 lbf ft1 lbf ft/s1 lbf/ft21 F1 Btu = 1British thermal unit
Conversions                    Usual Pressure Units       Atmospheric Pressure       Density of Water
1 lbm = 0.454 kg lbf / in2  or  (psi) = 1.0 kgf / cm2 = 1 gr/ cm3   =  1 gr / mL
1 ft    = 0.3048 m kgf / cm2 = 1.0 x 105 Pascal =  1000gr / 1000cm3    =  1 kg / L
1 F   = (5/9)  C 106 Pa = MPa = 14.7 psi =  1000kg / 1000L        =  1 ton / m3