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Distance and Speed. Distance is the amount of space between two objects. The most common unit of distance is the meter △d = d 2 –d 1 The change in distance is equal to the difference between the beginning distance (usually zero) and the finished distance.

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## Distance and Speed

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**Distance is the amount of space between two objects. The**most common unit of distance is the meter • △d = d2 –d1 • The change in distance is equal to the difference between the beginning distance (usually zero) and the finished distance.**Time – the duration between two events and usually is**measure in seconds, minutes or hours • △t = t2-t1 • The change in time is equal to the difference between the beginning time ( usually zero) and the finishing time**Speed- is a rate of motion**• V= speed • V= △d/△t • Speed is the ratio between the change in distance and the change in time • V = (d2-d1)/(t2-t1) • Vav = △d/ △t • Average speed takes into consideration acceleration, constant speed and deceleration**Distance and time are two terms that are linked when we look**at how fast we travel • We might walk at 6km/hr, drive at 100km/hr or ride a mountain bike downhill at 45km/hr • Ex Ian runs at 100m/10s or 10m/s

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