Engineering Units of Measure http://rlv.zcache.com/vitruvian_man_measurements_leonardo_da_vinci_postcard-r8f6ae8a31edc406796d443410ce43bb0_vgbaq_8byvr_512.jpg

SI Prefixes SI Prefix Symbol Factor Example Tera- T 1012 1 T-byte = 1012 bytes Giga- G 109 1 GW = 109 watts Mega- M 106 1 MJ = 106 joules Kilo- k 103 1 km = 103 meters Centi- c 10-2 1 cm = 10-2 meters Milli- m 10-3 1 mA = 10-3 amperes Micro- 10-6 1 mV = 10-6 volts Nano- n 10-9 1 nm = 10-9 meters Pico- p 10-12 1 pm = 10-12 meters

Engineering Units of Measure Mass kg lb 1kg = 2.2lbs Length m ft 1in = 2.54cm Time s s --- Area m2 ft2 ?? Volume m3 ft3 ?? Velocity m/s ft/s ?? What are the missing conversions?

Practice Problems Convert the following: 45 m3 = ________ ft3

Practice Problems Convert the following: 120 ft2 = ________ m2

Practice Problems Convert the following: 26 ft/s = ________ m/s

Engineering Units of Measure Acceleration m/s2 ft/s2 Force N or 𝑘𝑔∙𝑚 𝑠 2 lbf Energy J or N-m Btu Work J or N-m Btu Power W or J/s Btu/s Pressure Pa or N/m2 psi

Practice Problems Convert the following: 9.8 m/s2 = ________ ft/s2

Practice Problem Pressure What engineering term is most likely associated with the units shown below? 𝑘𝑔 𝑚∙𝑠 2 Pressure

Practice Problem Energy or Work What engineering term is most likely associated with the units shown below? 𝑘𝑔∙ 𝑚 2 𝑠 2 Energy or Work

Practice Problem Power What engineering term is most likely associated with the units shown below? 𝑘𝑔∙ 𝑚 2 𝑠 3 Power