Common units of mass (both English and SI)Correct AnswersGram, Pound, Kilogram,
and Slug
Primary unit for mass (SI)Correct AnswersKilograms (kg)
Primary unit for force(SI)Correct AnswersNewtons (N)
Primary unit for mass (Eng)Correct AnswersPound-mass (lbm)
Primary unit for Force (Eng)Correct AnswersPound-force (lbf)
Relationship between mass and weightCorrect AnswersW=mg where g is the
gravitational constant; mass remains constant and is an inherent property of the item,
weight is dependent upon the value of g at a given location
Gravitational constant on earth (English and SI)Correct Answersg = 32.2 ft/sec²;
9.81m/s²
Note on consistent and inconsistent unitsCorrect AnswersUsing consistent units is
preferable but may not be needed. When inconsistency arises, simply be sure to note
when conversion factors are needed.
Definition of weightCorrect AnswersW= g/gc; the force exerted on an object given it
position in a gravitational field
Specific weight(weight density)Correct Answersγ=W/V where v is volume
length (SI)Correct Answersmeter (m)
mass (SI)Correct Answerskilogram (kg)
time(SI)Correct Answerssecond (s)
electric current (SI)Correct AnswersAmp (A)
temperature (SI)Correct AnswersKelvin (K)
amount of substance (SI)Correct Answersmole (mol)
luminous intensity (SI)Correct Answerscandela (cd)
frequency (SI)Correct Answershertz (Hz)
force (SI)Correct AnswersNewton (N)
pressure/stress (SI)Correct AnswersPascal (Pa; N/m²)
energy/work (SI)Correct AnswersJoule (J; N*m)
Power (SI)Correct AnswersWatt (W; J/s)
electric charge (SI)Correct AnswersCoulomb (C)
electric potential(SI)Correct AnswersVolt (V; W/A)
capacitance (SI)Correct AnswersFarad(f; C/V)
resistance (SI)Correct AnswersOhm (Θ; V/A)
conductance (SI)Correct AnswersSiemen (S)
magnetic flux (SI)Correct Answersweber (Wb; V*s)
magnetic flux density(SI)Correct AnswersTesla (T; Wb/m²)
inductance (SI)Correct AnswersHenry (H; Wb/A)
luminous fluxCorrect Answerslumen (lm)
illuminanceCorrect Answerslux (lx; lm/m²)
plane angleCorrect Answersradian (rad)
areaCorrect Answerssquare meter (m²)
volumeCorrect Answerscubic meter (m³)
linear speedCorrect Answersmeter per second (m/s)
angular speedCorrect Answersradian per second (rad/s)