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10 cards from this deck
Velocity is speed with direction; can be positive or negative.
Speed is how fast something moves, always positive.
Positive acceleration means an object is speeding up.
a_avg = (v(t+h) - v(t)) / h.
a(t) = lim(h -> 0) (v(t+h) - v(t)) / h.
'Initially' refers to time t = 0.
'At rest' means velocity v = 0.
Constant velocity means acceleration a = 0.
The unit for acceleration is m/s².
Velocity shows how displacement changes over time.
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