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.
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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
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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
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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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