## Units of Variables Often Encountered in Mechanics

 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.

## 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