Game Development Reference
In-Depth Information
How to do it
•
Time
: Time is a scalar quantity (completely specified by its magnitude and with no
direction) measured in seconds:
Time = Distance / Speed
•
Distance
: The standard unit of distance—a scalar quantity—is the meter, abbrevi-
ated to m:
Distance=Speed * Time
•
Mass
: Mass is a scalar quantity measured in kilograms, abbreviated to kg. Mass is
the measure of an amount of something.
•
Velocity
: Velocity is a vector quantity (a quantity that has magnitude and direction)
that expresses the rate of change of distance over time. The standard unit of meas-
urement of velocity is meters per second, abbreviated to m/s. This can be ex-
pressed mathematically as:
v = ∆x / ∆t
The Greek capital letter ∆, read as delta, is used in mathematics to denote a change
in quantity.
•
Acceleration
: Acceleration is a vector quantity that expresses the rate of change of
velocity over time and is measured in meters per second square, written as m/s².
Acceleration can be expressed mathematically as:
a = ∆v / ∆t
