Speed: The principal ran a marathon, 26.2 miles, in 3 hours., Eduardo rode his skateboard 10 meters in 1 second., The dog ran at a rate of 3 m/s., The change in distance over a specific amount of time., Speed = Distance/time, , m/hr, m/s, km/hr, Velocity: Speed in a given direction, velocity = distance/time ..... plus a direction, mi/hr north, m/s west, Geese fly about 64 kilometers per hour when they migrate south., A tornado moves east towards Houston at 30 km/hr., A car drives north at 400 kilometers per hour., Acceleration: Change in speed or velocity over time, Speeding up or slowing down, Changing direction, m/s2, An airplane slows down at a rate of 3 m/s2, A bicyclist leans over as she makes a turn down a hill, A train slows to a stop at a station., The football player increases his speed to catch the ball.,

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