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Speed is the rate of change of distance with time.

Speed (v) = Distance(s) / Time(t)

Speed is a scalar quantity that refers to "how fast an object is moving."

a scalar quantity has magnitude only.

  • Speed is directly proportional to distance when time is constant: v ∝ s (t constant)
  • Speed is inversely proportional to time when distance is constant: v ∝ 1/t (s constant)

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