Physics - 2 - Motion
[Pages:99]MOTION
IB PHYSICS | UNIT 2 | MOTION
2.1
Velocity
IB PHYSICS | UNIT 2 | MOTION
What is Motion?
An object's change in __p__o_s_i_t_i_o_n___
relative to a reference point.
Relative to the earth: Moving 17,500 mph
Relative to the shuttle: Not moving
Distance vs. Displacement
Distance
How far travelled
Displacement
How far from origin
Try this | Distance and Displacement
You walked 3 miles East, turned left, then walked 4 miles North. What is your distance? displacement?
5 4
Distance
3
Displacement
7 miles 5 miles
Constant Displacement
Not moving
Time (s) Time (s)
Distance (m) Velocity (m s-1)
Average Speed and Velocity
Average Speed =
* Always Positive
Average Velocity =
* Includes Direction
Calculating Average Speed
New world record for a marathon (26.2 miles) was set several years ago. David Kimetto finished in 2.04 hours. What was his average speed?
=
=
26.2 2.04
=
12.8
mi
hr-1
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