Term
SI units (abbreviated form of "Le Systeme International d'Unites") 

Definition
standard units of measurement 


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the units for length, mass, & time 


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Where did the name "base SI units" come from? 

Definition
these units are used along with various laws to define additional units for other important physical quantities (ex. force & energy) 


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Definition
units for other physical quantities besides the base units; made from combinations of the base units 


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Can quantities of different units be added & subtracted? 

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The speed of an object must be specified as a _____ unit divided by a _____ unit 

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the physical nature of a quantity & the type of unit used to specify it 


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When using trigonometry, what must be done before labeling the sides of the triangle as "opposite" or "adjacent"? 

Definition
angle "theta" must be identified 


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When would you use inverse trigonometric functions? 

Definition
when the values for two sides of the right triangle are available & the value of the angle "theta" is unknown 


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What symbol is used to denote inverse trigonometric functions? 

Definition
an exponent of 1 next to sin, cos, or tan 


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Definition
hypotenuse^2 = opposite^2 + adjacent^2 


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Definition
a quantity that can be described with a single number giving its size or magnitude 


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4 examples of scalar quantities 

Definition
volume, time, temperature, & mass 


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a quantity that deals with both magnitude & direction 


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What does the direction of the arrow when depicting a vector represent? 

Definition
the direction of the vector 


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The length of a vector arrow is proportional to the _____ of the vector 

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What is the fundamental distinction between scalars & vectors? 

Definition
vectors have direction, scalars do not 


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Definition
the total vector after vector addition; denoted by a capital R with an arrow above 


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When can vector addition be done in an identical fashion to addition of two scalar numbers (i.e. 2 + 3 = 5)? 

Definition
when the vectors point along the same direction 


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What happens to a vector when it is multiplied by 1? 

Definition
the magnitude of the vector remains the same, but the direction of the vector is reversed 


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Definition
positive or negative numbers (with units) that is positive if the vector points along the positive x or y axis and negative if it points along the negative x or y axis 


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a vector that has a magnitude of 1, but no dimensions 


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How is the unit vector denoted? 

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when every vector component is individually 0 


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When are two vectors equal? 

Definition
if, and only if, they have the same magnitude & direction 

