Technical Physics 1
Motion
How far ?
–
distance
or
displacement
?
–
Distance  the length of the path traveled. It is not defined by the direction, it is
a scalar quantity.
–
Displacement  the length and direction of a line from the starting point to the
ending point. It is a vector quantity and must include direction.
How fast ?
–
speed
or
velocity
–
speed  the distance per unit of time. It is a scalar quantity.
–
average speed
–
instantaneous speed
–
Velocity  the displacement per unit of time. It is a vector and must include
direction.
–
instantaneous velocity
–
constant velocity
Changing motion
–
Acceleration
–
the rate of change in velocity. May be moving faster (+ acceleration), slower (
acceleration “deceleration”) or just changing direction.
–
Units include one unit for length and two units of time. ie. m/s/s (m/s
2
)
–
constant acceleration  the change in velocity remains the same during each
successive time interval
Formulas
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 Spring '08
 Warren
 Physics, Acceleration, Force, Velocity, 32 ft, technical physics

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