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Position m (meters)
Time s (seconds)
Speed m/s
Acceleration m/s^2
Force N (Newtons)
Mass kg (kilograms)
Amount of material mol (moles)
Scalars, Vectors…
A.
A scalar is a quantity that is just a number
B.
Scalars include: mass, electric charge, speed (magnitude of
velocity), volume in a container
C.
A vector quantity has a magnitude and direction: 70mph
NE
D.
Vectors include: position, velocity, acceleration
E.
Know that vector quantities add.
Motion…
A.
Position (displacement) location relative to the center of a
coordinate system
B.
Velocity rate of change of position
C.
Acceleration rate of change of velocity
D.
Force F=ma, rate of change of momentum
E.
Momentum mass x velocity
(p)
F.
Speed magnitude of velocity
G.
Distance magnitude of a displacement
Special Relativity…
A.
Two postulates
a.
The speed of light is a constant independent of
the source
b.
Physics laws are the same in all inertial reference
frames (an inertial frame is one that is not
accelerating)
B.
Moving clocks run slow. This is called Time dilation.
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 Fall '07
 Sherrill

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