a. Define average velocity and average acceleration. Provide their units. b. Define instantaneous velocity and instantaneous acceleration. Provide their units. c. A truck covers 60 m in 12 seconds while smoothly slowing down to a final speed of 5 m/s. Find its original speed and its acceleration. d. A particle moves along the x-axis according to the equation x = 2+ 3t² – t°, where x is in meters. Att=3 seconds, find (a) the position of the particle, (b) its velocity, and (c) its acceleration.

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