Damon Pryor
Physics Notes
2.72.9, Chapter 3
12/13/06
Free Fall Acceleration: The constant rate at which an object accelerates downward. It
occurs on a vertical axis not a horizontal one, and is positive when traveling up but
negative when traveling back down.
g : the unit used to measure the rate of free fall as well as it’s magnitude
9.8 (or 9.81): Gravity
Vector: Has magnitude and direction (ex: velocity, acceleration).
Vector Quantity: A quantity that can be measured with a vector because it has magnitude
and direction.
Scalars: physical quantities that do not involve direction, which we deal with by using
simple algebra.
Displacement Vector: a vector that represents displacement (duh)
Vector sum (resultant): is the combination of ab +bc = ac. Or properly noted :
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View Full DocumentVector Subtraction:
Component of a vector: is the projection of a vector on an axis.
Resolving the Vector: the process of drawing two perpendicular lines to find the x
component (the projection on the x axis) the y component (the projection on the y axis)
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 Fall '07
 Wagner
 Vector Space, Dot Product, pH, Acceleration, Standard basis

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