Speed: A dog runs really fast at 37 km/h, Light travels at 300,000,000 m/s., The fastest human ran at an average speed of 27.8 mph, The fastest pitch thrown was 105 mph, The speed limit in front of Yorktown is 25 mph, Acceleration : Runners start slowing down as they get tired, A sailboat moves faster as the wind picks up, A plane taking off from the runway, You hit the brakes a little as you go down a big hill so you can stop at the stop sign at the bottom, Pick up the speed, students! You will be late for class.",

Speed or Acceleration?

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