Each of four particles move along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by particle 1: x(t) = 3.5 – 2.7t^3 particle 2: x(t) = 3.5 + 2.7t^3 particle 3: x(t) = 3.5 + 2.7t^2 particle 4: x(t) = 3.5 – 3.4t – 2.7t^2 Which of these particles have constant acceleration? A) All four B) Only 1 and 2 C) Only 1 and 3 D) Only 3 and 4

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