Units of Variables Often Encountered in Mechanics

Quantity Standard International Units (SIU) United States Units (USU)

Length

meter (m)

foot (ft)

centimeter (cm) = 10-2 m

inch (in.) = 1/12 ft

milimeter (mm) = 10-3 m

micrometer (pm) = 10-6 m

Time

second (s)

second (s)

millisecond (ms) = 10-3 s

millisecond (ms) = 10-3 s

Velocity

m/s

ft/s

cm/s

in./s

Acceleration

m/s2

ft/s2

cm/s2

in./s2

Mass

kilogram (kg)

slug

gram (g) = 10-3 kg

Force

newton (N)

pound (lb)

dyne (dyn) = 10-5 N

Stress

N/m2 = pascal (Pa)

lb/in.2

dyn/cm2 = 0.1 Pa

Note: A force of 1 N can accelerate a body of 1 kg to 1 m/s2. A force of 1 dyn can accelerate a body of mass 1 g to 1 cm/s2.

Note: A force of 1 N can accelerate a body of 1 kg to 1 m/s2. A force of 1 dyn can accelerate a body of mass 1 g to 1 cm/s2.

Was this article helpful?

0 0
Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

Get My Free Ebook


Post a comment